Method for setting start-up parameters of double-wall corrugated pipe production line and related device

Abstract

The application relates to a method for setting starting parameters of a double-wall corrugated pipe production line and a related device, and relates to the technical field of pipe production. The method comprises the following steps: obtaining target specification information of a production task and solidification parameters associated with a production line device; defining the start and end positions of a pipe flaring section as a global space-time reference for the coordinated action of multiple actuators in the starting process; based on the global space-time reference and a preset coordination rule library, the reference rotating speed of an extruder is calculated according to the unit length weight of the pipe and a preset production line speed; the multi-section variable speed positions of a forming machine and the extruder and the action trigger positions of at least one forming valve are calculated according to the start and end positions of the pipe flaring section and the predefined offset in the coordination rule library; a starting parameter set is constructed; and the production line starting operation is controlled based on the starting parameter set. The above technical scheme can effectively improve the production efficiency and product quality.

Description

Technical Field

[0001] This application relates to the field of pipe manufacturing, and in particular to a method and related apparatus for setting start-up parameters of a double-wall corrugated pipe production line. Background Technology

[0002] With the continuous growth of market demand, higher requirements are being placed on the production efficiency and product quality of double-wall corrugated pipe production lines. An efficient, stable, and precise production line is crucial for meeting the needs of large-scale production, reducing production costs, and enhancing enterprise competitiveness.

[0003] In the traditional setup of double-wall corrugated pipe production lines, relatively simple methods are typically used. One common approach is to set the extruder speed and molding machine speed based on experience. Operators roughly determine these speeds based on past production experience, but this method lacks precise calculations and scientific basis. Another approach is to gradually adjust parameters through trial production. An initial set of parameters is set, and then the parameters are continuously fine-tuned based on product quality and production conditions until a relatively satisfactory production result is achieved. However, both methods have certain limitations in practical applications.

[0004] Existing methods for setting start-up parameters for double-wall corrugated pipe production lines struggle to accurately determine suitable start-up parameters based on the target specifications of the production task and the fixed parameters of the production line equipment. The lack of precise calculations and scientific coordination rules prevents effective coordination between actuators, resulting in inconsistent pipe quality that fails to meet the production demands of different pipe specifications and reduces the production line's overall efficiency. Summary of the Invention

[0005] This application provides a method and related apparatus for setting the start-up parameters of a double-wall corrugated pipe production line. By scientifically and rationally setting the start-up parameters of the double-wall corrugated pipe production line, the accuracy and adaptability of the start-up parameters are improved, the flaring and forming quality is guaranteed, and production efficiency and product quality are enhanced.

[0006] In a first aspect, this application provides a method for setting the start-up parameters of a double-wall corrugated pipe production line, the production line including an extruder, a forming machine, and multiple forming valves, the method comprising:

[0007] Obtain the target specification information of the production task and the curing parameters associated with the production line equipment. The target specification information includes the unit length weight of the pipe and the start and end positions of the flared section of the pipe. The curing parameters include the maximum theoretical extrusion volume and maximum speed of the extruder.

[0008] The start and end positions of the flared section of the pipe are defined as the global spatiotemporal reference for the coordinated action of multiple actuators during the startup process;

[0009] Based on the global spatiotemporal reference and the preset collaborative rule base, in the extrusion speed calculation model based on the material balance principle, the reference speed of the extruder is calculated according to the unit length weight of the pipe and the preset production line speed. In the logic generation model based on position mapping, the multi-stage speed change positions of the forming machine and the extruder, as well as the action trigger position of at least one forming valve, are calculated according to the start and end positions of the flared section of the pipe and the predefined offset in the collaborative rule base. The collaborative rule base contains the mapping relationship between the action positions of each actuator and the global spatiotemporal reference.

[0010] Based on the reference speed of the extruder, the multi-stage speed change positions of the molding machine and the extruder, and the activation trigger position of at least one molding valve, a set of start-up parameters is constructed, and the set of start-up parameters is output to the control system of the production line to control the start-up operation of the production line.

[0011] By adopting the above technical solution, the flaring section is defined as a global spatiotemporal reference, and a complete set of start-up parameters is automatically calculated based on a collaborative rule base. This transforms the traditional manual debugging process, which relies on human experience, into automatic system generation, significantly reducing the dependence on operators' technical experience and enabling new employees to quickly complete start-up settings. Using the start and end positions of the flaring section as a unified reference, the movement positions of all actuators (extruder, forming machine, forming valve) are generated through predefined offset rules, ensuring precise coordination of each actuator in the spatial position near the flaring section and avoiding production defects caused by misaligned action sequences. The extruder's reference speed is calculated based on the material balance principle, fundamentally ensuring the matching of extrusion volume and consumption. Combined with precise positional collaborative control, this significantly reduces repeated trial-and-error adjustments during start-up, significantly shortening setup time and reducing scrap rates. The implicit worker operating experience is transformed into an explicit collaborative rule base and parameterized model, allowing successful start-up experience to be systematically stored and reused, providing stable and reliable initial values ​​of start-up parameters for the production of pipes of different specifications.

[0012] In some embodiments, calculating the reference rotational speed of the extruder based on the unit length weight of the pipe and a preset production line speed specifically includes:

[0013] Obtain the cross-sectional structural parameters of the pipe in the flared and non-flared sections. The cross-sectional structural parameters include the variation law of the inner wall thickness along the axial direction and the variation law of the outer wall thickness along the axial direction in the flared section, as well as the fixed inner and outer wall thickness values ​​in the non-flared section.

[0014] Based on the start and end positions of the flared section and the cross-sectional structural parameters, an instantaneous unit length weight decomposition relationship is established along the pipe axis. The decomposition relationship allocates the unit length weight of the pipe at each target position along the axis to the inner and outer layers respectively according to the wall thickness variation law of the inner and outer layers at each target position along the axis, thereby obtaining the instantaneous unit length weight of the inner and outer layers at each target position along the axis.

[0015] The instantaneous unit length weight of the inner and outer layers at each target position on the axis is combined with the preset production line speed and converted into the instantaneous extrusion amount required by the extruder at each moment in the time domain.

[0016] Using the instantaneous extrusion volume requirement as the target and the maximum theoretical extrusion volume and maximum speed of the inner and outer extruders in the curing parameters as constraints, the curve of the reference speed of the inner and outer extruders during the start-up process is determined.

[0017] By employing the above technical solution, and by acquiring the cross-sectional structural parameters of the flared and non-flared sections, and establishing the instantaneous unit length weight decomposition relationship along the pipe axis, the problem of dynamic fluctuations in material demand caused by changes in the inner and outer wall thicknesses of the flared section is solved, making the extrusion calculation more closely match the actual structural characteristics of the pipe. The instantaneous unit length weight at each axial position is combined with the production line speed to convert it into the instantaneous extrusion quantity required by the extruder at each moment in the time domain, achieving a precise mapping from spatial positional demand to time-series control, providing accurate input for the dynamic control of the extruder. With the instantaneous extrusion quantity demand as the target and equipment capacity as the constraint, the curve of the extruder's reference speed changing with time is solved, ensuring that the extruder can respond in real time to the dynamic changes in material demand when passing through the flared section, avoiding wall thickness defects caused by material accumulation or insufficient supply in the flared section under traditional fixed speed conditions. The maximum theoretical extrusion quantity and maximum speed in the solidified parameters are introduced as constraints during the calculation process, ensuring that the generated speed curve always remains within the safe operating range of the equipment, satisfying both the special process requirements of the flared section and guaranteeing the safety and operational stability of the equipment.

[0018] In some embodiments, calculating the multi-stage speed change positions of the molding machine and the extruder, as well as the action trigger position of at least one molding valve, based on the start and end positions of the flared section and the predefined offsets in the collaborative rule base, specifically includes the following steps:

[0019] Obtain all actuator types and quantities that need to generate position parameters from the collaborative rule base. The actuator types include molding machine speed change points, extruder speed change points, and multiple molding valves.

[0020] For the target executor type, a position generation rule template for the target executor type is obtained from the collaborative rule base. The template defines the reference and offset direction of the action position of the target executor type. The target executor type can be any executor type.

[0021] Position calculations are performed in batches according to actuator type. The multi-stage speed change positions of the molding machine and the extruder are directly calculated based on the corresponding rule templates. The action trigger positions of each molding valve are generated by calling the preset molding valve position calculation submodule.

[0022] The calculated action positions of all actuators are uniformly sorted and logically verified according to the order along the pipe axis. If a logical conflict occurs, it is adjusted according to the preset priority rules.

[0023] By adopting the above technical solution, the system obtains the types and quantities of all actuators requiring position parameter generation from the collaborative rule base, and classifies different types of actuators such as molding machine speed change points, extruder speed change points, and molding valves, achieving full coverage of all actuators participating in the collaboration during startup and avoiding omissions. A position generation rule template is configured for each type of actuator, uniformly specifying the reference (flaring start or end point) and offset direction of the action position. This template-based design allows for modification of the template only when adding actuators or adjusting rules, without rewriting the calculation logic, enhancing the system's scalability. Position calculation is performed in batches according to actuator type: the multi-stage speed change positions of the molding machine and extruder are directly calculated based on the template, while the action positions of each molding valve are generated by calling a dedicated calculation submodule. This hierarchical calculation architecture ensures both the efficiency of general calculations and accommodates the complexity of molding valve control. All calculated actuator action positions are uniformly sorted and logically verified according to their order along the pipe axis, and automatic adjustments are made according to preset priority rules when position conflicts occur. This mechanism ensures that the generated parameter set is executable in physical space, avoiding production failures caused by misaligned action timing.

[0024] In some embodiments, calculating the multi-speed change positions of the molding machine and the extruder, as well as the actuation trigger position of at least one molding valve, further includes:

[0025] The type of each forming valve and its functional role in the flaring section control are obtained from the collaborative rule base. The types include at least a normal inflation valve for pipe forming, an inner layer inflation valve for inner layer support, a flaring venting valve for flaring section shaping, and an inner layer vacuum valve for inner layer adsorption forming.

[0026] Based on the functional role of each molding valve, the action offset relative to the flaring start point or flaring end point is matched from the collaborative rule base. The opening position of the normal inflation valve and the inner layer inflation valve is located before the flaring start point, and the opening position of the flaring deflation valve is located after the flaring end point.

[0027] Based on the start and end positions of the flared section and the action offset, calculate the opening and closing positions of each forming valve during the start-up process;

[0028] The set air pressure value for inner layer inflation is obtained, and the segmented air pressure adjustment rules for the inner layer inflation valve at different positions in the flare section are obtained from the collaborative rule base. Based on the set air pressure value and the segmented air pressure adjustment rules, the base air pressure value of the inner layer inflation valve before the start of the flare section, the intermediate air pressure value during the passage of the flare section, and the end pressure boost value after the end of the flare section are generated.

[0029] By adopting the above technical solution, and classifying the forming valves (normal inflation valve, inner layer inflation valve, flaring vent valve, and inner layer vacuum valve) and clarifying their functional roles in the flaring section control, targeted control logic design is achieved, avoiding the problem that a "one-size-fits-all" control method cannot meet the special process requirements of each valve. Based on the functional role of each forming valve, its action offset relative to the flaring start or end point is matched from the collaborative rule library. This ensures that the normal inflation valve and inner layer inflation valve open in advance before the flaring start point to establish stable air pressure, and the flaring vent valve opens after the flaring end point to avoid damaging the formed part, achieving precise synchronization between the forming valve action and the flaring section process. For the inner layer inflation valve, based on its segmented air pressure adjustment rules at different positions in the flaring section, a base air pressure value before the flaring start point, an intermediate air pressure value during the flaring process, and a final pressure boost value after the flaring end point are generated. This solves the technical problem of dynamically adjusting the inner layer support air pressure during the flaring section forming process, avoiding flaring collapse or bulging defects caused by constant air pressure. The vague understanding from workers' experience that "the air pressure in the inner layer of the flared section needs to be gradually increased" is transformed into explicit segmented air pressure adjustment rules and solidified in the collaborative rule base. This makes the fine control of inner layer inflation no longer dependent on the on-site judgment of operators, and realizes the standardization and reusability of process knowledge.

[0030] In some embodiments, calculating the multi-speed change positions of the molding machine and the extruder, as well as the actuation trigger position of at least one molding valve, further includes:

[0031] Based on the characteristics of the flaring forming process, the flaring section and the areas before and after the flaring section are divided into multiple sub-regions with different control objectives. The sub-regions include the pre-inflation zone in front of the flaring section for establishing air pressure, the main forming zone inside the flaring section for forming, and the post-forming zone behind the flaring section for shaping and cooling.

[0032] For each sub-region, different offset sets are defined according to the control objectives of the sub-region. The offset of the pre-inflated zone is used to control the early opening of each forming valve to establish a stable air pressure. The offset of the main forming zone is used to control the speed adjustment of the extruder and forming machine to ensure the flaring forming quality. The offset of the post-forming zone is used to control the opening of the venting valve and vacuum valve to avoid damaging the formed part.

[0033] Based on the function type of each actuator and its role in the control of the flared section, determine the sub-region to which it belongs and select the offset set of the corresponding sub-region.

[0034] Based on the offset set of the selected sub-regions and the start and end positions of the flared section, calculate the trigger positions of all actions of each actuator during the power-on process to ensure that the actuator actions in different sub-regions match the control target of the region.

[0035] Adopting the above technical solution, based on the characteristics of the flaring forming process, the flaring section and its surrounding areas are divided into three sub-regions with different control objectives: a pre-inflation zone, a main forming zone, and a post-forming zone. This refines the control granularity of the start-up parameters from the "overall flaring section" to "segmented within the region," laying the foundation for subsequent differentiated control. Different offset sets are defined for each sub-region: the offset in the pre-inflation zone controls the early opening of the forming valve to establish stable air pressure; the offset in the main forming zone controls the speed adjustment of the extruder and forming machine to ensure flaring forming quality; and the offset in the post-forming zone controls the opening of the venting valve and vacuum valve to avoid damaging the formed portion. This regionalized rule design ensures a high degree of matching between the control logic and process requirements. Based on the function type of each actuator and its role in the flaring section control, its corresponding sub-region is automatically determined, and the offset set of the corresponding sub-region is selected for calculation. This dynamic matching mechanism ensures that the correct control rules can be invoked when the same actuator may perform different functions in different regions. Based on the offset set of the selected sub-regions and the start and end positions of the flared section, the trigger positions of all actions of each actuator during the startup process are calculated, so that the actuator actions in the pre-inflation zone, main forming zone, and post-forming zone serve the regional targets of "pressure building", "forming", and "forming" respectively, avoiding cross-regional action interference and ensuring the forming quality of the flared section.

[0036] In some embodiments, the method further includes dynamically optimizing the offsets in the collaborative rule base, specifically including:

[0037] Multiple successful production cases are obtained from the historical parameter database. Each successful production case includes the start and end positions of the flared section and the actual action trigger positions of each actuator during the production process.

[0038] For the target offset in the collaborative rule base, the actual value corresponding to the target offset is extracted from each of the successful production cases. The actual value is obtained by subtracting the corresponding flare start point or flare end point from the actual action trigger position of the actuator in the successful production case.

[0039] Statistical analysis is performed on all extracted actual values. After removing outliers that exceed the preset reasonable range, the arithmetic mean or median of the remaining actual values ​​is calculated as the optimized candidate value of the target offset.

[0040] The target offset in the collaborative rule base is updated to the optimization candidate value, or the target offset is updated after a weighted fusion of the optimization candidate value and the target offset.

[0041] By employing the above technical solution, the actual action trigger positions of each actuator are extracted from historical successful production cases, and the actual offset values ​​are calculated in reverse. This enables the originally static collaborative rule base to continuously learn from production practice, achieving dynamic evolution of the rule base. By subtracting the corresponding flare start or end point from the actual action trigger positions of the actuators in successful cases, the "implicit experience" of workers' on-site fine-tuning is transformed into quantifiable actual offset values, allowing the previously difficult-to-capture and inherit on-site debugging wisdom to be digitally accumulated. Statistical analysis is performed on all extracted actual values, and outliers exceeding the preset reasonable range are removed before calculating the arithmetic mean or median. This avoids data pollution caused by single abnormal production or misoperation, ensuring the representativeness and reliability of optimization candidate values. The optimization candidate values ​​directly update the target offset in the collaborative rule base, or are smoothly updated through weighted fusion, allowing the parameter generation of subsequent production tasks to inherit historical successful experience, forming a virtuous cycle. The system continuously improves the accuracy of startup parameters as the frequency of use increases.

[0042] In some embodiments, after generating the power-on parameter set, the following steps are further included:

[0043] Search the historical parameter database for at least one successful case that matches the unit length weight of the pipe and the start and end positions of the flared section of the current production task. The matching criteria are that the relative deviation of the unit length weight of the pipe does not exceed the first preset threshold and the absolute deviation of the start and end positions of the flared section does not exceed the second preset threshold.

[0044] Extract the final set of historical startup parameters from the successful cases found in the search. The set of historical startup parameters includes the multi-stage speed and position of the extruder, the multi-stage speed and position of the molding machine, and the action position and pressure parameters of each molding valve.

[0045] The boot parameter set is merged with the historical boot parameter set. During merging, the weight of each parameter is determined according to the matching degree between the current task and the successful case. The higher the matching degree, the greater the weight of the parameter in the historical boot parameter set.

[0046] The fused parameter set is output to the production line control system as the final startup parameter set, and after this production is successful, the final parameter set used is stored in the historical parameter database as a new success case.

[0047] By adopting the above technical solution, based on the initial startup parameter set generated by the parametric model, historical successful cases are introduced for fusion. This ensures that the final parameters retain the universality of the physical model and positional logic while incorporating the specificity of historical experience, thus solving the potential deviation problem of pure model calculation when dealing with complex working conditions. Using the relative deviation of the weight per unit length of pipe and the absolute deviation of the start and end positions of the flared section as the criteria, successful cases matching the current task are selected from the historical parameter database. This avoids parameter deterioration caused by blindly fusing irrelevant cases, ensuring the reliability of the fusion basis. The fusion weight is determined based on the degree of matching between the current task and the successful cases; the higher the degree of matching, the greater the weight of the historical parameters. This adaptive weighting strategy allows the system to dynamically adjust the fusion ratio according to the case similarity. When the similarity is high, historical experience is fully utilized; when the similarity is low, model calculation takes precedence, achieving an optimal balance between the two. The final parameter set after this successful production is stored as a new successful case in the historical parameter database, continuously enriching the case library as production tasks increase. Subsequent production of similar specifications can draw upon more and more matching historical cases, forming a virtuous cycle, and the system continuously improves the accuracy of startup parameters as the frequency of use increases.

[0048] In a second aspect, embodiments of this application provide a computer system including a memory, a processor, and a computer program stored in the memory; the processor executes the computer program to implement the steps of the method described in any possible implementation of the first aspect.

[0049] Thirdly, embodiments of this application provide a computer-readable storage medium having a computer program / instructions stored thereon, which, when executed by a processor, implement the steps of the method described in any possible implementation of the first aspect.

[0050] Fourthly, embodiments of this application provide a computer program product, including a computer program / instructions, which, when executed by a processor, implement the steps of the method described in any possible implementation of the first aspect.

[0051] It is understood that the computer system provided in the second aspect, the storage medium provided in the third aspect, and the computer program product provided in the fourth aspect are all used to execute the method provided in this application. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0052] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0053] 1. Traditional startup processes rely on workers' personal experience, which is difficult to replicate and pass on. This application's embodiment defines the start and end positions of the flared section as a global spatiotemporal reference and constructs a collaborative rule base containing mapping relationships, transforming workers' fuzzy experience into precise, computable mathematical rules. This allows successful startup experience to be systematically saved and reused, achieving the solidification of process knowledge;

[0054] 2. During startup, the extruder, molding machine, and multiple molding valves need to complete complex coordinated actions within a very short spatial distance. In this embodiment, the flared section is used as the sole reference frame, and the position of all actuators is defined by their offset relative to the start or end point of the flare. This method ensures that all equipment is naturally synchronized in spatial position, avoiding product defects caused by misaligned action sequences.

[0055] 3. Operators only need to input a few key target values ​​such as the weight per meter of pipe and the flare position, and the system can automatically calculate a complete set of start-up parameters based on the built-in physical and logical models. This changes the complex process of traditional methods that require workers to repeatedly try and adjust dozens of parameters based on experience, greatly reducing the dependence on the operator's technical level and enabling new employees to quickly complete the start-up settings;

[0056] 4. This application embodiment integrates an extrusion speed calculation model based on the material balance principle. This model deduces the appropriate reference speed of the extruder based on the weight per meter of the pipe and the production speed, ensuring a basic match between the extrusion volume per unit time and the consumption per unit time. This avoids serious quality problems such as uneven wall thickness, material blockage, or breakage caused by excessive or insufficient extrusion volume from the source, and reduces blind trial and error in the initial stage of start-up. Attached Figure Description

[0057] Figure 1 This is a schematic flowchart illustrating the framework of the method for setting the start-up parameters of a double-wall corrugated pipe production line in the embodiments of this application.

[0058] Figure 2 This is a schematic diagram of the overall process for setting the start-up parameters of the double-wall corrugated pipe production line in the embodiments of this application;

[0059] Figure 3This is a schematic diagram of an exemplary hardware structure of a computer system in an embodiment of this application. Detailed Implementation

[0060] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this application refers to any or all possible combinations including one or more of the listed items.

[0061] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0062] The following is combined Figure 1 The method of the embodiments of this application will be described below.

[0063] Please see Figure 1 This is a schematic diagram of the framework flow of the method for setting the start-up parameters of the double-wall corrugated pipe production line in the embodiments of this application.

[0064] like Figure 1 As shown, the production line includes an extruder, a molding machine, and multiple molding valves. The setup method includes the following steps:

[0065] S101. Obtain the target specification information of the production task and the curing parameters associated with the production line equipment. The target specification information includes the unit length weight of the pipe and the start and end positions of the flared section of the pipe. The curing parameters include the maximum theoretical extrusion volume and maximum speed of the extruder.

[0066] S102. Define the start and end positions of the flared section of the pipe as the global spatiotemporal reference for the coordinated action of multiple actuators during startup.

[0067] S103. Based on the global spatiotemporal reference and the preset collaborative rule base, in the extrusion speed calculation model based on the material balance principle, the reference speed of the extruder is calculated according to the unit length weight of the pipe and the preset production line speed. In the logic generation model based on position mapping, the multi-stage speed change positions of the forming machine and the extruder and the action trigger position of at least one forming valve are calculated according to the start and end positions of the flared section of the pipe and the predefined offset in the collaborative rule base. The collaborative rule base contains the mapping relationship between the action positions of each actuator and the global spatiotemporal reference.

[0068] S104. Based on the reference speed of the extruder, the multi-stage speed change position of the molding machine and the extruder, and the action trigger position of at least one molding valve, a start-up parameter set is constructed, and the start-up parameter set is output to the control system of the production line to control the start-up operation of the production line.

[0069] S101. Obtain the target specification information of the production task and the solidified parameters associated with the production line equipment.

[0070] The data preparation stage for setting startup parameters aims to collect the input data required for subsequent model calculations. Specifically, it includes the acquisition of two types of parameters: The first type is target specification information, which is entered by the operator when creating a new production task in the HMI interface or selected from the specification library. This information includes at least: (1) the unit length weight of the pipe: for example, 3kg / m. This parameter reflects the amount of material used in the pipe and is the basis for subsequent material balance calculations; (2) the start and end positions of the flared section of the pipe: for example, the flared start point is 163mm and the flared end point is 343mm. The flared section is the key part of the socket connection of the double-wall corrugated pipe, and its forming quality directly determines the product qualification rate. This position information will serve as the benchmark for the coordinated action of all actuators during the entire startup process. The second type is fixed parameters, which are stored in the parameter library in the system that is strongly related to the specific equipment model. This parameter remains basically unchanged during the equipment life cycle and includes at least: (1) the maximum theoretical extrusion volume of the extruder: including the maximum theoretical extrusion volume of the outer extruder and the maximum theoretical extrusion volume of the inner extruder; (2) the maximum speed of the extruder: including the maximum speed of the outer extruder and the maximum speed of the inner extruder. These two types of parameters together constitute the input boundary for model calculation.

[0071] During the startup process of double-wall corrugated pipes, the flaring section is the most technically challenging area. Within an extremely short spatial distance (e.g., only 180mm from the flaring start point to the end point), multiple actuators (extruder, forming machine, multiple forming valves) need to complete a series of actions such as speed switching, pressure building, venting, and vacuuming at precise locations. Any slight timing misalignment will result in defective products. The start and end positions of the flaring section (flaring start and end points) are defined as a global spatiotemporal reference. This global spatiotemporal reference refers to using a key physical feature with defined geometric dimensions on the pipe product (in this embodiment, the start and end positions of the flaring section) as a unified reference coordinate system for all motion and control actuators throughout the production line during startup. Spatially, the position of all actions is calculated with offset from the physical position of this reference; temporally, the movement of this reference point in the equipment coordinate system as the production line runs constitutes the timeline for event triggering. This definition transforms the complex timing coordination problem into a problem of defined spatial relative positions. By sharing the same spatiotemporal reference, the actions of all actuators are naturally synchronized in spatial position, eliminating the need for complex timing calculations. This definition transforms fuzzy experience into precise, computable mathematical benchmarks.

[0072] This application includes two parallel core models that address two main issues: material supply balance and motion position coordination. The extrusion speed calculation model based on the material balance principle addresses the core problem of extruder rotation speed. The specific calculation logic is as follows: Using the obtained unit length weight of the pipe, the preset production line speed (e.g., the basic speed of the molding machine), and the maximum theoretical extrusion volume and maximum rotation speed of the extruder from the fixed parameters as inputs, the model uses the material balance principle of "extrusion volume per unit time = consumption per unit time" to deduce the required benchmark rotation speed of the extruder from the pipe weight per meter and the production speed. Example calculation formulas: Outer layer extruder benchmark rotation speed = (pipe unit length weight × outer wall weight percentage / 60 × molding machine basic speed) / (outer wall screw maximum output / outer wall screw maximum rotation speed); Inner layer extruder benchmark rotation speed = (pipe unit length weight × inner wall weight percentage / 60 × molding machine basic speed) / (inner wall screw maximum output / inner wall screw maximum rotation speed). This model ensures a basic balance in material supply, fundamentally avoiding serious quality defects such as uneven wall thickness, material blockage, or breakage caused by mismatched extrusion volumes. The core problem solved by the position mapping-based logic generation model is the position of the speed change of the molding machine and extruder, as well as the position of each molding valve switch. The specific calculation logic is as follows: the global spatiotemporal reference (flaring start and end position) and the predefined offset in the collaborative rule base are used as inputs. Taking the flaring section as the reference, all action positions are generated by the reference point + offset. The generated content includes: (1) the multi-segment speed change position of the molding machine: for example, S0 = flaring start point - 40, S1 = flaring start point - 10, S7 = flaring end point + 200, etc., each position corresponds to a speed value (e.g., flaring section speed = base speed × 0.8); (2) the multi-segment speed change position of the extruder: the speed change point is also generated based on the flaring position, and the speed is scaled proportionally according to the reference rotation speed; (3) the action trigger position of the molding valve: including the normal inflation valve opening / closing position, the inner layer inflation valve opening / closing position, the flaring venting valve position, the inner layer vacuum valve position, etc. The collaborative rule base is a key support for this model. It stores the mapping relationship between the action positions of each actuator and the global spatiotemporal reference, specifically manifested as a series of predefined offset rules. For example: "Normal inflation valve opening position = flaring start point - 50mm", "flaring vent valve opening position = flaring end point + 30mm", etc. The two models run in parallel, outputting the extruder reference speed and the action positions of each actuator respectively, together forming the complete startup parameter basis.

[0073] The startup parameter set includes at least the following: multiple speeds and corresponding positions of the outer extruder, multiple speeds and corresponding positions of the inner extruder, multiple speeds and corresponding positions of the forming machine, pressure and distance parameter sets for the normal pneumatic forming valve, pressure and distance parameter sets for the inner pneumatic forming valve, distance parameter set for the flared venting forming valve, and distance parameter set for the inner vacuum forming valve. These parameters are organized into a PLC-recognizable format, displayed on the HMI interface for operator confirmation, and then transmitted to the production line control system via a one-click download. After the production line starts operating according to these parameters, the operator can make minor adjustments based on the actual pipe quality to achieve optimal performance. This model-generated initial values ​​+ manual fine-tuning confirmation mode leverages the intelligent advantages of the model while retaining the flexibility of manual on-site judgment, achieving one-click intelligent setting of the startup process.

[0074] Figure 2 This is a schematic diagram of the overall process for setting the start-up parameters of the double-wall corrugated pipe production line in the embodiments of this application, as shown below. Figure 2 As shown, a new production task is initiated. The operator inputs core parameters, including the weight per meter of pipe (weight per unit length of pipe), the start and end positions of the flaring section, the basic speed of the forming machine, and key manual values ​​(such as inner air pressure). The system loads the corresponding fixed parameter library. Clicking the "Intelligent Generation" button, the physical balance model calculates the basic speed of the extruder, and the position logic model, based on the flaring section, calculates the positions of all speed change points and generates the on / off positions of each air valve and speed / pressure curves. Based on the above parameters, a complete set of recommended parameters is output. The HMI displays the complete recommended parameter set. If the operator confirms, the PLC loads the parameters and starts the machine. If the operator does not confirm, the parameter set is manually modified. During equipment operation, it is determined whether the optimal state has been reached. If so, production is successful, and the learning and optimization loop is completed. If not, fine-tuning is performed.

[0075] In some embodiments, calculating the reference rotational speed of the extruder based on the unit length weight of the pipe and a preset production line speed specifically includes:

[0076] Obtain the cross-sectional structural parameters of the pipe in the flared and non-flared sections. The cross-sectional structural parameters include the variation law of the inner wall thickness along the axial direction and the variation law of the outer wall thickness along the axial direction in the flared section, as well as the fixed inner and outer wall thickness values ​​in the non-flared section.

[0077] Based on the start and end positions of the flared section and the cross-sectional structural parameters, an instantaneous unit length weight decomposition relationship is established along the pipe axis. The decomposition relationship allocates the unit length weight of the pipe at each target position along the axis to the inner and outer layers respectively according to the wall thickness variation law of the inner and outer layers at each target position along the axis, thereby obtaining the instantaneous unit length weight of the inner and outer layers at each target position along the axis.

[0078] The instantaneous unit length weight of the inner and outer layers at each target position on the axis is combined with the preset production line speed and converted into the instantaneous extrusion amount required by the extruder at each moment in the time domain.

[0079] Using the instantaneous extrusion volume requirement as the target and the maximum theoretical extrusion volume and maximum speed of the inner and outer extruders in the curing parameters as constraints, the curve of the reference speed of the inner and outer extruders during the start-up process is determined.

[0080] In the production of double-wall corrugated pipes, there are significant differences in the structure of the flared section (socket joint) and the straight section (non-flared section). The inner and outer wall thicknesses of the non-flared section are relatively fixed, and the material distribution is uniform, belonging to the steady-state production area. In order to realize the socket connection function, the inner and outer wall thicknesses of the flared section change along the axial direction. Specifically, the outer wall thickness usually gradually increases in the flared section to provide sufficient socket strength. The thickening may be gradual, starting from the flaring point, gradually increasing, reaching the maximum in the middle of the flaring, and then gradually returning to normal. The inner wall thickness may be thinned or remain unchanged, depending on the mold design. Therefore, the obtained cross-sectional structural parameters include at least: (1) the variation law of the inner wall thickness of the flared section along the axial direction: for example, the wall thickness increases linearly from a certain value to a certain value and then decreases linearly, or changes in the form of a polynomial function. (2) the variation law of the outer wall thickness of the flared section along the axial direction: same as above. (3) the fixed inner and outer wall thickness values ​​of the non-flared section: as a reference value. These parameters can be obtained from mold design drawings, product specifications, or actual measurement data, and form the basis for subsequent material decomposition models.

[0081] Based on the start and end positions of the flared section, the pipe is divided into several sections along the axis: the area in front of the flared section, the area inside the flared section, and the area behind the flared section. The variation law of the inner and outer layer wall thickness corresponding to each section is determined by the obtained cross-sectional structural parameters. For each target position x on the axis, the cross-sectional area of ​​the inner and outer layers at that position is calculated according to the inner and outer layer wall thickness values. Then, combined with the material density, the instantaneous unit length weight of the inner and outer layers at that position is obtained. A decomposition relationship is established: the total unit length weight of the pipe at position x = the instantaneous unit length weight of the inner layer at position x + the instantaneous unit length weight of the outer layer at position x. The instantaneous unit length weight of the inner and outer layers is a function that dynamically changes with x, rather than a constant value. The essence of this decomposition relationship is to dynamically allocate the total material requirement of the pipe to the inner and outer layers according to the actual variation law of the inner and outer layer wall thicknesses of the flared section, so that subsequent extrusion control can accurately match the instantaneous demand at each position.

[0082] Obtain the preset production line speed v (i.e., the basic operating speed of the extruder). The production line speed determines the distance the pipe moves forward per unit time. Establish a spatiotemporal mapping relationship: a certain axial position x on the pipe corresponds to a production time t after the start-up time, and satisfies the relationship x = v × t. This means that when the production line is running at speed v, at time t, the segment at position x on the pipe is being produced. Combine the instantaneous unit length weight of the inner and outer layers at position x with the corresponding production time t to obtain the instantaneous extrusion amount required at time t: Instantaneous extrusion amount required by the inner layer extruder at time t = instantaneous unit length weight of the inner layer at position x × production line speed v; Instantaneous extrusion amount required by the outer layer extruder at time t = instantaneous unit length weight of the outer layer at position x × production line speed v. The essence of this transformation is to convert the static material demand based on spatial location into a dynamic extrusion demand based on time, providing precise target values ​​for the real-time control of the extruder.

[0083] The solidification parameters provide the maximum theoretical extrusion volume and maximum speed of the inner and outer extruders, which represent the upper limit of the equipment's capacity. The extrusion volume at any given time must not exceed the maximum theoretical extrusion volume, and the speed at any given time must not exceed the maximum speed. An extrusion volume-speed relationship is established. There is a proportional relationship between the actual extrusion volume and the speed of the extruder: Actual extrusion volume = (Current speed / Maximum speed) × Maximum theoretical extrusion volume. This relationship directly links the speed and the extrusion volume. The speed function is solved. Using the obtained instantaneous extrusion volume requirement as the objective and the equipment capacity as the constraint, the functions N_inner(t) and N_outer(t) of the inner extruder speed versus time are solved, satisfying the following conditions: At each time t, the actual extrusion volume calculated based on the speed should not be less than and should be as close as possible to the required instantaneous extrusion volume. Throughout the entire startup process, the speed must not exceed the maximum speed, and the corresponding extrusion volume must not exceed the maximum theoretical extrusion volume. At the beginning and end of the flaring section, the rate of change of speed does not exceed a preset smoothing threshold to avoid extrusion pressure fluctuations caused by sudden changes in speed. Finally, the results are output. The baseline rotational speed of the inner and outer layer extruders during startup was obtained as a function of time. This curve is not a single constant rotational speed, but a dynamic function that changes over time, enabling precise matching of material requirements changes as the flaring section passes through.

[0084] In some embodiments, calculating the multi-stage speed change positions of the molding machine and the extruder, as well as the action trigger position of at least one molding valve, based on the start and end positions of the flared section and the predefined offsets in the collaborative rule base, specifically includes the following steps:

[0085] Obtain all actuator types and quantities that need to generate position parameters from the collaborative rule base. The actuator types include molding machine speed change points, extruder speed change points, and multiple molding valves.

[0086] For the target executor type, a position generation rule template for the target executor type is obtained from the collaborative rule base. The template defines the reference and offset direction of the action position of the target executor type. The target executor type can be any executor type.

[0087] Position calculations are performed in batches according to actuator type. The multi-stage speed change positions of the molding machine and the extruder are directly calculated based on the corresponding rule templates. The action trigger positions of each molding valve are generated by calling the preset molding valve position calculation submodule.

[0088] The calculated action positions of all actuators are uniformly sorted and logically verified according to the order along the pipe axis. If a logical conflict occurs, it is adjusted according to the preset priority rules.

[0089] During the startup process of double-walled bellows, the actuators involved in the collaborative control are diverse in type and numerous in number. The actuator types obtained from the collaborative rule base in this application embodiment include at least: (1) Molding machine speed change points: the molding machine needs to change its running speed at multiple positions during startup, and each speed change point corresponds to a spatial position and a speed value; (2) Extruder speed change points: including the outer extruder and the inner extruder, which also need to change their speed at multiple positions to adapt to the special process requirements of the flaring section; (3) Multiple molding valves: including normal inflation valve, inner inflation valve, flaring venting valve, inner vacuum valve, etc., each molding valve needs to generate an open position and a closed position. By obtaining all actuator types and quantities, the system can fully grasp the task scope of this parameter generation and avoid incomplete parameter sets due to the omission of a certain actuator. At the same time, this statistical information also provides a basis for subsequent batch calculations.

[0090] For any actuator type (i.e., the target actuator type), the system retrieves the corresponding position generating rule template from the collaborative rule base. This template defines two core elements for calculating the position of this type of actuator: (1) The reference for the action position: Is it based on the starting point of the flare or the ending point of the flare? For example, the opening position of a normal inflation valve is usually based on the starting point of the flare, while the opening position of a flare venting valve is usually based on the ending point of the flare. (2) The offset direction: Is it offset forward (i.e., along the pipe production direction, the value increases) or backward (i.e., against the production direction, the value decreases) based on the reference point? For example, "flare starting point -50mm" means offset backward by 50mm, and "flare ending point +30mm" means offset forward by 30mm. The rule template adopts a standardized definition method of "reference + direction", unifying the originally scattered and empirical offset rules into structured data. This template design allows for the modification of the template content when adding actuators or adjusting rules, without rewriting the calculation logic, which greatly enhances the maintainability and scalability of the system.

[0091] Considering the computational complexity and logical differences between different types of actuators, the embodiments of this application adopt a batch computation strategy:

[0092] The first batch: Calculation of multi-stage speed change positions for molding machines and extruders. The calculation logic for speed change points in molding machines and extruders is relatively straightforward: based on the acquired rule template, the formula "reference point + offset" is directly applied for calculation. For example, if the rule template is defined as "based on the flare start point, offset backward 40mm", then the speed change point position = flare start point - 40mm. If the rule template is defined as "based on the flare end point, offset forward 200mm", then the speed change point position = flare end point + 200mm. These actuators typically have multiple speed change points (e.g., S0, S1, S2...S7), and the system will iterate through all speed change points and complete the calculation sequentially.

[0093] The second batch: Calculation of the trigger positions for each forming valve. For forming valves, the control logic is more complex than simple speed changes: each forming valve needs to calculate two positions (open and closed), and the rules for these two positions may differ. The operating positions of the forming valves are closely related to air pressure control, requiring comprehensive consideration of the forming process requirements of the flaring section. Different types of forming valves (normal inflation valve, inner layer inflation valve, flaring vent valve, inner layer vacuum valve) have different functional roles, and their position calculations must meet their respective process requirements.

[0094] Therefore, this embodiment does not directly perform simple calculations on the forming valve, but instead calls a preset forming valve position calculation submodule. This submodule is a dedicated calculation program specifically designed for the characteristics of forming valves. It encapsulates all the logic and rules for forming valve position calculation and can automatically calculate the precise open and closed positions based on the type, functional role, and flared section position of the forming valve.

[0095] All action positions are uniformly sorted and logically verified. First, the system uniformly sorts the calculated action positions of all actuators (including the speed change points of the forming machine and extruder, and the opening / closing positions of each forming valve) according to their sequence along the pipe axis. The sorted results can intuitively show where each actuator will trigger its action sequentially as the pipe moves forward during startup. Second, the system performs logical verification to check whether the sequence of action positions conforms to the process logic of flaring forming. Common logical conflicts include: the closing position of a forming valve is later than the opening position of the next forming valve, causing air pressure interference; the speed change points of the forming machine and the extruder are misaligned, resulting in uncoordinated speed changes; the opening position of the flaring vent valve is earlier than the flaring end point, causing premature air pressure release and affecting flaring shaping; the opening position of the inner vacuum valve overlaps with the closing position of the inner inflation valve, causing inner support failure. If a logical conflict is found, the system automatically adjusts according to preset priority rules. Priority rules reflect the importance and sequential dependencies of different actuator actions. For example, flaring and forming actions (such as flaring and venting valves) have higher priority than auxiliary actions; safety-related actions (such as pressure building) have higher priority than efficiency-related actions (such as speed adjustment). In the event of a conflict, the lower-priority action position yields to the higher-priority action position, and the overall logic remains feasible by fine-tuning the offset. This verification and adjustment mechanism ensures that the generated parameter set is not only mathematically correct but also physically and logically executable, avoiding production failures caused by parameter conflicts.

[0096] In some embodiments, calculating the multi-speed change positions of the molding machine and the extruder, as well as the actuation trigger position of at least one molding valve, further includes:

[0097] The type of each forming valve and its functional role in the flaring section control are obtained from the collaborative rule base. The types include at least a normal inflation valve for pipe forming, an inner layer inflation valve for inner layer support, a flaring venting valve for flaring section shaping, and an inner layer vacuum valve for inner layer adsorption forming.

[0098] Based on the functional role of each molding valve, the action offset relative to the flaring start point or flaring end point is matched from the collaborative rule base. The opening position of the normal inflation valve and the inner layer inflation valve is located before the flaring start point, and the opening position of the flaring deflation valve is located after the flaring end point.

[0099] Based on the start and end positions of the flared section and the action offset, calculate the opening and closing positions of each forming valve during the start-up process;

[0100] The set air pressure value for inner layer inflation is obtained, and the segmented air pressure adjustment rules for the inner layer inflation valve at different positions in the flare section are obtained from the collaborative rule base. Based on the set air pressure value and the segmented air pressure adjustment rules, the base air pressure value of the inner layer inflation valve before the start of the flare section, the intermediate air pressure value during the passage of the flare section, and the end pressure boost value after the end of the flare section are generated.

[0101] In the production of double-wall corrugated pipes, the forming of the flared section depends on the precise coordination of multiple forming valves. Each valve plays an irreplaceable role at different stages of the flared section. The forming valve types obtained from the coordination rule base in this application include at least the following: (1) Normal inflation valve: Its function is pipe forming, used to inflate the inside of the pipe, so that the molten plastic expands in the molding die to form a corrugated structure, which is the basic air pressure source for pipe forming; (2) Inner layer inflation valve: Its function is inner layer support, used to provide support air pressure to the inner layer pipe wall, prevent the inner layer from collapsing during the forming process of the flared section, and ensure that the inner wall of the flared section is smooth and flat; (3) Flared section venting valve: Its function is to release air after the flared section is shaped. It is opened after the flared section is shaped to release the internal air pressure and avoid the continuous action of air pressure causing deformation of the formed part; (4) Inner layer vacuum valve: Its function is inner layer adsorption forming. By drawing a vacuum, the inner layer pipe wall is tightly adsorbed on the molding die to ensure the precise forming of the inner layer corrugated shape. These four forming valves have different functional roles, and their activation timing (open / closed position) and pressure parameters (for the inner inflation valve) need to be designed differently according to their respective positions in the flared section control.

[0102] Based on the acquired functional roles, the system matches preset action offset rules for each forming valve from the collaborative rule base. These rules reflect the grasp of the timing of forming valve action in the experience of excellent workers, specifically as follows: (1) For normal air filling valve and inner air filling valve, the reference is: the starting point of the flare is the reference; the offset direction is: before the starting point of the flare (i.e., the opposite production direction); the process principle is: these two valves need to establish a stable air pressure before the pipe enters the flare section to ensure that when the pipe reaches the starting point of the flare, the internal air pressure has reached the forming requirements. If the air pressure is established too late, the beginning part of the flare section may have poor forming; offset example: normal air filling valve opening position = flare starting point - 50mm, inner air filling valve opening position = flare starting point - 30mm. (2) For the flaring vent valve, the reference is the end point of the flaring; the offset direction is after the end point of the flaring (i.e., in the production direction); the process principle is that the flaring section has been shaped when it passes the end point of the flaring. At this time, it is necessary to release the internal air pressure in time to avoid the continuous action of air pressure causing the formed part to bulge or deform. The vent valve must be opened after the flaring section has completely passed through. Therefore, it is located after the end point of the flaring; the offset example is: the opening position of the flaring vent valve = the end point of the flaring + 20mm. (3) For the inner vacuum valve, the reference is that, depending on the specific process requirements, it may be based on the starting point or the end point of the flaring, or there may be a specific overlapping area with the flaring section; the offset direction is to meet the process requirements of the inner adsorption. Usually, there is a long overlapping area with the flaring section; the process principle is that the inner vacuum valve makes the inner tube wall stick tightly to the mold by drawing a vacuum. Its action area needs to cover the entire flaring section and the surrounding area. Therefore, its opening position is usually before the starting point of the flaring and the closing position is after the end point of the flaring.

[0103] The opening and closing positions of each forming valve are calculated based on the start and end positions of the flaring section and the offset. The specific calculation logic is as follows: For each forming valve, its calculation reference (flaring start point or flaring end point) and offset direction (forward or backward) are determined according to the matching rules; the opening and closing positions are calculated according to the following formulas: If the rule takes the flaring start point as the reference, the operating position = flaring start point ± offset; if the rule takes the flaring end point as the reference: operating position = flaring end point ± offset; where "±" is determined by the offset direction: forward offset (in the production direction) uses "+", and backward offset (against the production direction) uses "-". Calculate the open and closed positions for each forming valve separately. The calculation rules for these two positions may differ. For example: Normal inflation valve: Open position = flare start point - 50mm, Closed position = flare end point + 100mm; Inner layer inflation valve: Open position = flare start point - 30mm, Closed position = flare end point + 80mm; Flare vent valve: Open position = flare end point + 20mm (the closed position may not be near the flare section or may be determined by other conditions); Inner layer vacuum valve: Open position = flare start point - 40mm, Closed position = flare end point + 60mm. Through this calculation, each forming valve obtains a clear opening and closing position precisely associated with the flare section position, providing spatial coordinates for subsequent air pressure control and action execution.

[0104] Traditional control methods typically use a constant air pressure for the inner layer inflation valve. However, during the flaring section forming process, the inner layer's demand for supporting air pressure changes dynamically: a base air pressure is needed to establish support at the beginning of the flaring section; a stable intermediate air pressure is needed to maintain the forming process; and final pressurization is required when the flaring section is about to be completed to ensure a firm flaring shape. The specific implementation logic is as follows: Obtain the set air pressure value for inner layer inflation. This value is manually entered by the operator on the HMI interface and serves as the benchmark for generating the air pressure curve. For example, the set air pressure value is 500 mbar; Obtain the segmented air pressure adjustment rules for the inner layer inflation valve at different positions in the flaring section from the collaborative rule base. These rules are a digital representation of worker experience. For example, before the start of the flaring section: base pressure = set pressure × 0.8 (pre-inflation stage, pressure slightly lower to avoid premature expansion); during the flaring section: intermediate pressure = set pressure × 1.0 (stabilization stage, maintaining standard pressure); after the end of the flaring section: final pressure boost = set pressure × 1.2 (pressure boosting and shaping stage, ensuring a firm flaring). Combining the calculated operating positions of the inner layer inflation valve (open and closed positions) and the start and end positions of the flaring section, the above segmented pressure rules are mapped to specific position intervals: the base pressure is applied from the open position to the flaring start point; the intermediate pressure is applied from the flaring start point to the flaring end point; and the final pressure boost is applied from the flaring end point to the closed position. This generates a pressure change curve for the inner layer inflation valve during startup. This curve is not a constant value, but a piecewise function that dynamically adjusts with changes in pipe position, accurately matching the different requirements for inner layer support pressure at each stage of the flaring section.

[0105] In some embodiments, calculating the multi-speed change positions of the molding machine and the extruder, as well as the actuation trigger position of at least one molding valve, further includes:

[0106] Based on the characteristics of the flaring forming process, the flaring section and the areas before and after the flaring section are divided into multiple sub-regions with different control objectives. The sub-regions include the pre-inflation zone in front of the flaring section for establishing air pressure, the main forming zone inside the flaring section for forming, and the post-forming zone behind the flaring section for shaping and cooling.

[0107] For each sub-region, different offset sets are defined according to the control objectives of the sub-region. The offset of the pre-inflated zone is used to control the early opening of each forming valve to establish a stable air pressure. The offset of the main forming zone is used to control the speed adjustment of the extruder and forming machine to ensure the flaring forming quality. The offset of the post-forming zone is used to control the opening of the venting valve and vacuum valve to avoid damaging the formed part.

[0108] Based on the function type of each actuator and its role in the control of the flared section, determine the sub-region to which it belongs and select the offset set of the corresponding sub-region.

[0109] Based on the offset set of the selected sub-regions and the start and end positions of the flared section, calculate the trigger positions of all actions of each actuator during the power-on process to ensure that the actuator actions in different sub-regions match the control target of the region.

[0110] In the production of double-wall corrugated pipes, the flaring section forming is a dynamic process with completely different control requirements at different stages. Traditional methods treat the flaring section as a whole for control, which cannot meet the differentiated needs of each stage. This application's embodiment, based on the characteristics of the flaring forming process, divides the flaring section and its surrounding areas into three sub-regions with different control objectives: a pre-inflating zone, a main forming zone, and a post-forming zone. The pre-inflating zone is the area in front of the flaring section (against the production direction) used to establish stable air pressure; the main forming zone is the interior of the flaring section (from the flaring start point to the flaring end point) used to ensure the flaring forming quality; and the post-forming zone is the area behind the flaring section (in the production direction) used for shaping and cooling to avoid damaging the formed portion.

[0111] Based on the three sub-regions, the system defines a special set of offsets for each region from the collaborative rule base. (1) Offset set for the pre-inflated zone: Control objective: Establish stable air pressure; Offset design principle: Control the early opening of each forming valve to ensure that the air pressure has been established before the pipe enters the main forming zone. Specific rule example: Normal inflation valve opening position = flaring start point - 50mm (belonging to the pre-inflated zone); Inner layer inflation valve opening position = flaring start point - 30mm (belonging to the pre-inflated zone). Generally, the opening action of the vent valve and vacuum valve is not set in the pre-inflated zone to avoid disrupting the establishment of air pressure. (2) Offset set for the main forming zone: Control objective: Ensure the flaring forming quality; Offset design principle: Control the speed adjustment of the extruder and forming machine to ensure that the material supply and forming speed match during the forming process of the flaring section. Specific rule example: The speed of the forming machine inside the flaring section = base speed × 0.8 (reducing the speed is beneficial to forming); The rotation speed of the extruder inside the flaring section = base speed × 0.9 (reducing the extrusion amount to match the speed reduction). All forming valves in the main forming zone remain open to maintain stable air pressure. (3) Offset set of the post-forming zone: Control objective: forming and cooling to avoid damage to the formed part; Offset design principle: control the opening of the vent valve and vacuum valve, release air pressure in time and start adsorption, while avoiding premature damage to the flaring. Specific rule example: Flaring vent valve opening position = flaring end point + 20mm (belonging to the post-forming zone); Inner vacuum valve opening position = flaring end point + 10mm (belonging to the post-forming zone). The extruder and forming machine in the post-forming zone gradually restore the basic speed. Through this regionalized offset definition, the control rules in each sub-region are highly matched with its control objective, avoiding control conflicts caused by the mixing of cross-region rules.

[0112] The sub-regions to which each actuator belongs are determined according to the function type and action stage of the actuator. The specific implementation logic is as follows: Clarify the function type of each actuator. The actuators are mainly divided into two categories: (1) Molding valves: normal inflation valve, inner layer inflation valve, flaring vent valve, inner layer vacuum valve, etc., which mainly undertake the function of air pressure control. (2) Speed ​​control: molding machine speed change point, extruder speed change point, which mainly undertake the function of speed adjustment. Analyze the action stage of each actuator in the flaring section control. For example: Normal inflation valve: needs to be opened in advance in the pre-inflation zone, kept open in the main molding zone, and closed in time in the post-forming zone. Therefore, it spans three zones, but the state is different in different zones. Flaring vent valve: mainly plays a role in the post-forming zone, and should be kept closed before opening. Molding machine speed change point: may start to decelerate in the pre-inflation zone, maintain low speed in the main molding zone, and start to accelerate in the post-forming zone. Based on the above analysis, determine the sub-region to which each actuator belongs. For actuators that span multiple regions, the system will configure corresponding control rules for each region: in the pre-inflation zone, the offset set of the pre-inflation zone is executed; in the main molding zone, the offset set of the main molding zone is executed; and in the post-setting zone, the offset set of the post-setting zone is executed.

[0113] The trigger positions for all actions are calculated based on the offset set of the selected sub-regions. The specific implementation logic is as follows: For each actuator, the corresponding offset set is selected according to the determined sub-region. For actuators spanning multiple regions, the offset set for each region needs to be selected separately. Combining the start and end positions of the flared section (flare start point and flare end point), the action trigger positions are calculated according to the following principles: Action positions in the pre-charge zone: calculated according to the offset rules of the pre-charge zone, based on the flare start point; Action positions in the main forming zone: calculated according to the offset rules of the main forming zone, based on the flare start point and flare end point; Action positions in the post-forming zone: calculated according to the offset rules of the post-forming zone, based on the flare end point. For each actuator, its action positions in different regions are integrated to form a complete action sequence for that actuator. For example, the inner layer inflation valve: In the pre-charge zone: Open position = flare start point - 30mm (start inflation); In the main forming zone: Keep open (no new action); In the post-forming zone: Closed position = flare end point + 80mm (stop inflation). A global check is performed to ensure that the actuator actions in different sub-regions match the control objectives of their respective regions: In the pre-inflation zone: check for any vent valves that have been mistakenly opened, disrupting pressure buildup; in the main forming zone: check if the speed adjustment is adequate and the air pressure is stable; in the post-forming zone: check if the vent valves and vacuum valves open in a timely manner and if the speed gradually recovers. If any mismatch is found, the system adjusts according to preset priority rules to ensure that the final generated parameter set meets the control objectives of each sub-region.

[0114] In some embodiments, the method further includes dynamically optimizing the offsets in the collaborative rule base, specifically including:

[0115] Multiple successful production cases are obtained from the historical parameter database. Each successful production case includes the start and end positions of the flared section and the actual action trigger positions of each actuator during the production process.

[0116] For the target offset in the collaborative rule base, the actual value corresponding to the target offset is extracted from each of the successful production cases. The actual value is obtained by subtracting the corresponding flare start point or flare end point from the actual action trigger position of the actuator in the successful production case.

[0117] Statistical analysis is performed on all extracted actual values. After removing outliers that exceed the preset reasonable range, the arithmetic mean or median of the remaining actual values ​​is calculated as the optimized candidate value of the target offset.

[0118] The target offset in the collaborative rule base is updated to the optimization candidate value, or the target offset is updated after a weighted fusion of the optimization candidate value and the target offset.

[0119] In the production of double-wall corrugated pipes, each successful production run represents a valuable accumulation of experience. After each production run, the system stores the final set of parameters, after fine-tuning and optimization, along with the specifications of the production task (such as the weight per unit length of pipe, the start and end positions of the flared section, etc.), as a new successful case in the historical parameter database. Each successful case includes at least: the start and end positions of the flared section: the starting and ending positions of the flared section during this production run; and the actual trigger positions of each actuator used during the production process: including the speed change points of the forming machine, the speed change points of the extruder, and the opening and closing positions of each forming valve, etc. These are the parameter values ​​that were finally determined after on-site fine-tuning and were actually successfully executed. These successful cases constitute the original data source for subsequent analysis. The more cases there are and the wider the range of specifications covered, the higher the reliability of subsequent statistical analysis.

[0120] The offsets stored in the collaborative rule base are preset theoretical values ​​(e.g., "50mm" in "normal inflation valve opening position = flare start point - 50mm"). However, in actual production, operators may fine-tune these theoretical values ​​based on the site conditions, resulting in a certain deviation between the final successful parameters and the theoretical values. These fine-tuned actual values ​​precisely reflect the essence of worker experience. For a specific target offset in the collaborative rule base (e.g., "offset of normal inflation valve opening position relative to flare start point"), this step extracts its corresponding actual value from each successful case. The extraction method is as follows: Determine the actuator and action type corresponding to the target offset. For example, if the target offset is "offset of normal inflation valve opening position", then the corresponding actuator is a normal inflation valve, and the action is opening. Obtain the actual action trigger position of the actuator from the case. For example, in a successful case, the actual opening position of the normal inflation valve is 195mm. Based on the reference type of the offset (whether it's based on the flare start point or the flare end point), calculate the actual offset. If the reference is the flare start point: Actual offset = Actual action trigger position - Flare start point; if the reference is the flare end point: Actual offset = Actual action trigger position - Flare end point. For example, in a case where the flare start point is 163mm and the normal inflation valve's actual opening position is 195mm, then the actual offset = 195 - 163 = 32mm. This means that in this case, the worker actually adjusted the valve opening position to 32mm ahead of the flare start point (note that the plus or minus sign represents direction). By repeating the above process on multiple successful cases, a set of actual value samples of the target offset is obtained: [32, 31, 33, 30, 35, ...]. These sample values ​​reflect the results of the worker's fine-tuning of the offset based on the actual situation in different production batches.

[0121] The actual values ​​are statistically analyzed and optimization candidate values ​​are calculated. The specific implementation logic is as follows: All extracted actual values ​​are initially reviewed and outliers that exceed the preset reasonable range are removed. The sources of outliers may include: special abnormal situations in the production process (such as sudden changes in raw material batches or abnormal ambient temperature); operator misoperation or recording errors; and abnormal adjustments caused by temporary equipment failures. The system automatically identifies and removes these outliers according to the preset reasonable range threshold (e.g., within ±50% of the theoretical value of the offset) to ensure the reliability of subsequent statistical analysis. The remaining actual values ​​after removing outliers are statistically analyzed, and their central tendency value is calculated as optimization candidate values. According to the data distribution characteristics, one of the following two statistical measures can be selected: (1) Arithmetic mean: suitable for cases where the data distribution is symmetrical and there is no obvious skewness. The remaining actual values ​​are added together and divided by the number to obtain the average offset. (2) Median: suitable for cases where the data is skewed or there are still a few outliers remaining. The remaining actual values ​​are sorted from smallest to largest, and the value in the middle position is taken as the representative value. For example, the remaining actual values ​​are [30, 31, 31, 32, 32, 32, 33, 33, 34], with an arithmetic mean of approximately 32 and a median of 32. This value represents the "general level" or "typical value" of this offset across multiple successful cases. Finally, the calculated arithmetic mean or median is used as an optimization candidate value for the target offset for subsequent rule base updates.

[0122] The specific implementation logic for updating the target offset in the collaborative rule base is as follows: The system selects one of the following two methods to update the target offset according to the preset update strategy: (1) Direct replacement. The original target offset in the collaborative rule base is directly replaced with the optimized candidate value calculated in step E3. Applicable scenarios: When the optimized candidate value comes from a large amount of reliable data and has a large deviation from the original value; or when the system is in a rapid learning phase and needs to quickly absorb new experience. (2) Weighted fusion. The optimized candidate value and the original target offset in the collaborative rule base are weighted and fused to obtain the updated offset. Weighted fusion formula: Updated offset = (original offset × original weight + optimized candidate value × new weight) / (original weight + new weight). The original weight can be determined based on the usage time or historical contribution of the original offset, and the new weight can be determined based on the number of cases analyzed this time. The more cases there are, the greater the new weight. Applicable scenarios: When the system enters a stable operating period, it needs to smoothly absorb new experience and avoid drastic fluctuations in the rule base.

[0123] In some embodiments, after generating the power-on parameter set, the following steps are further included:

[0124] Search the historical parameter database for at least one successful case that matches the unit length weight of the pipe and the start and end positions of the flared section of the current production task. The matching criteria are that the relative deviation of the unit length weight of the pipe does not exceed the first preset threshold and the absolute deviation of the start and end positions of the flared section does not exceed the second preset threshold.

[0125] Extract the final set of historical startup parameters from the successful cases found in the search. The set of historical startup parameters includes the multi-stage speed and position of the extruder, the multi-stage speed and position of the molding machine, and the action position and pressure parameters of each molding valve.

[0126] The boot parameter set is merged with the historical boot parameter set. During merging, the weight of each parameter is determined according to the matching degree between the current task and the successful case. The higher the matching degree, the greater the weight of the parameter in the historical boot parameter set.

[0127] The fused parameter set is output to the production line control system as the final startup parameter set, and after this production is successful, the final parameter set used is stored in the historical parameter database as a new success case.

[0128] In the production of double-wall corrugated pipes, different specifications of pipes (different unit length weights and different flaring section positions) have different requirements for start-up parameters, but similar specifications often have reference value. This application's embodiment searches a historical parameter database for successful cases matching the current production task. The matching criteria are based on two key dimensions: First, the relative deviation of the unit length weight of the pipe does not exceed a first preset threshold. The unit length weight directly determines the material supply of the extruder and is a core factor affecting start-up parameters. The relative deviation is the absolute value of the difference between the unit length weight of the current task and historical cases divided by the unit length weight of the current task. The first preset threshold is set, for example, to 5% or 10%, indicating that the allowable difference in weight per meter between historical cases and the current task is within a reasonable range. Exceeding this range indicates that the difference in material usage is too large and has no reference value. Second, the absolute deviation of the start and end positions of the flaring section does not exceed a second preset threshold. The start and end positions of the flaring section are a global spatiotemporal reference, determining the reference system for the movement positions of all actuators. Absolute deviation refers to the absolute value of the difference between the starting point and the ending point of the flare in the current task and historical cases, both of which must meet the requirements. A second preset threshold, for example, is set to 10 mm or 20 mm, indicating that the allowable difference in flare position between historical cases and the current task is within a reasonable range. Exceeding this range is considered an excessive difference in spatial reference, reducing the reference value of the action position.

[0129] For each successful case found, the system extracts its final set of historical startup parameters. "Final use" here refers to the parameters used in the actual successful operation after on-site fine-tuning, not the initial parameters generated by the model. These parameters have been validated in actual production and represent the best practices for that case specification. The extracted historical startup parameter set includes at least the following: extruder parameters, molding machine parameters, and molding valve parameters. Extruder parameters include the multiple speeds and corresponding positions of the inner and outer extruders; molding machine parameters include the multiple speeds and corresponding positions of the molding machine; and molding valve parameters include the operating positions (open / closed) and pressure parameters of each molding valve. These parameters constitute a complete and validated parameter template.

[0130] The current startup parameter set is merged with the historical startup parameter set. The specific implementation logic is as follows: First, the fusion weights are determined. The fusion is not a simple averaging of the two parameter sets, but rather a dynamic determination of their respective weights based on the degree of matching between the current task and successful cases. A higher degree of matching indicates a greater similarity between the historical case and the current task, making its experience more valuable to learn from; therefore, the historical parameters have a higher weight. The degree of matching can be calculated based on the two deviation values ​​mentioned above: a smaller relative deviation in weight per unit length indicates a higher degree of matching; a smaller absolute deviation in the start and end positions of the flared section indicates a higher degree of matching. These two deviation values ​​can be combined into a matching score, for example, matching score = 1 / (1 + relative deviation × coefficient 1 + absolute deviation × coefficient 2). Parameter fusion is then performed according to the determined weights. For each specific parameter item (e.g., the speed of the first stage of the outer extruder), the fusion method is: Fusion parameter = Current model parameter × (1 - Historical weight) + Historical case parameter × Historical weight. The historical weight is determined by the matching degree; a higher matching degree results in a larger historical weight. For example, the historical weight can be dynamically adjusted between 0.3 and 0.7. All parameters are fused one by one to form a completely new parameter set that integrates model calculations and historical experience. This parameter set retains the universal principles of the physical model and the location-logic model while incorporating the practical experience of successful historical cases, achieving a complementary advantage between the two. The ingenuity of this fusion strategy lies in the following: when no similar cases are found (match degree is 0), the fusion result is exactly equal to the model-generated parameters; when highly similar cases are found (match degree is very high), the fusion result draws more heavily on historical successful experience. For cases in between, the system dynamically adjusts based on similarity, achieving an adaptive balance.

[0131] The fused parameter set is used as the final startup parameter set and output to the production line control system to control the startup and operation of the production line. This parameter set combines the advantages of model calculation and historical experience, and theoretically is closer to the optimal solution than parameters generated solely by the model. After a successful production run, the system stores the final parameter set used in this production (which may be the fused parameters or parameters further fine-tuned on-site) as a new successful case in the historical parameter database. The stored information includes at least: the specifications of this production task: weight per unit length of pipe, start and end positions of the flared section; and the complete startup parameter set used in this production: extruder parameters, molding machine parameters, molding valve parameters, etc. Through this storage mechanism, the historical parameter database is continuously enriched and expanded. When encountering a production task with similar specifications the next time, the system will have more and more matching historical cases for reference, and the fused parameters will be more accurate.

[0132] The above describes the method for setting the start-up parameters of the double-wall corrugated pipe production line in the embodiments of this application. The computer system in the embodiments of this application will be described in detail below in conjunction with the above method for setting the start-up parameters of the double-wall corrugated pipe production line.

[0133] Please see Figure 3 This is a schematic diagram of an exemplary hardware structure of a computer system in an embodiment of this application.

[0134] In some embodiments, the computer system 300 includes a computer device, which may be a terminal device. The computer device includes a processor 301, a memory 302, a sensor module 303, a communication module 304, an input device 305, and an output device 306 connected via a system bus. The processor 301 of the computer device provides computing and control capabilities. The memory 302 of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database is used to store data.

[0135] Those skilled in the art will understand that Figure 3 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0136] In some embodiments of this application, a computer-readable storage medium is provided, including instructions that, when executed on the computer system 300, cause the computer system 300 to perform the method for setting the start-up parameters of the double-wall corrugated pipe production line in the embodiments of this application.

[0137] In some embodiments of this application, a computer program product is also provided, which, when run on a computer system 300, causes the computer system 300 to execute the method for setting the start-up parameters of the double-wall corrugated pipe production line in the embodiments of this application.

[0138] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0139] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive), etc.

[0140] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This program can be stored in a computer-readable storage medium, and when executed, it can include the processes described in the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM or random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A method for setting start-up parameters for a double-wall corrugated pipe production line, characterized in that, The production line includes an extruder, a molding machine, and multiple molding valves; the method includes: Obtain the target specification information of the production task and the curing parameters associated with the production line equipment. The target specification information includes the unit length weight of the pipe and the start and end positions of the flared section of the pipe. The curing parameters include the maximum theoretical extrusion volume and maximum speed of the extruder. The start and end positions of the flared section of the pipe are defined as the global spatiotemporal reference for the coordinated action of multiple actuators during the startup process; Based on the global spatiotemporal reference and the preset collaborative rule base, in the extrusion speed calculation model based on the material balance principle, the reference speed of the extruder is calculated according to the unit length weight of the pipe and the preset production line speed. In the logic generation model based on position mapping, the multi-stage speed change positions of the forming machine and the extruder, as well as the action trigger position of at least one forming valve, are calculated according to the start and end positions of the flared section of the pipe and the predefined offset in the collaborative rule base. The collaborative rule base contains the mapping relationship between the action positions of each actuator and the global spatiotemporal reference. A start-up parameter set is constructed based on the extruder's base speed, the multi-speed positions of the forming machine and the extruder, and the activation trigger position of at least one forming valve. This start-up parameter set is then output to the production line's control system to control the production line's start-up operation. The calculation of the extruder's reference rotational speed based on the unit length weight of the pipe and the preset production line speed specifically includes: Obtain the cross-sectional structural parameters of the pipe in the flared and non-flared sections. The cross-sectional structural parameters include the variation law of the inner wall thickness along the axial direction and the variation law of the outer wall thickness along the axial direction in the flared section, as well as the fixed inner and outer wall thickness values ​​in the non-flared section. Based on the start and end positions of the flared section and the cross-sectional structural parameters, an instantaneous unit length weight decomposition relationship is established along the pipe axis. The decomposition relationship allocates the unit length weight of the pipe at each target position along the axis to the inner and outer layers respectively according to the wall thickness variation law of the inner and outer layers at each target position along the axis, thereby obtaining the instantaneous unit length weight of the inner and outer layers at each target position along the axis. The instantaneous unit length weight of the inner and outer layers at each target position on the axis is combined with the preset production line speed and converted into the instantaneous extrusion amount required by the extruder at each moment in the time domain. Using the instantaneous extrusion volume requirement as the target, and the maximum theoretical extrusion volume and maximum speed of the inner and outer extruders in the curing parameters as constraints, the curves of the reference speed of the inner and outer extruders during the start-up process are determined. The step of calculating the multi-stage speed change positions of the molding machine and extruder, as well as the action trigger position of at least one molding valve, based on the start and end positions of the flared section and the predefined offsets in the collaborative rule base, specifically includes the following steps: Obtain all actuator types and quantities that need to generate position parameters from the collaborative rule base. The actuator types include molding machine speed change points, extruder speed change points, and multiple molding valves. For the target executor type, a position generation rule template for the target executor type is obtained from the collaborative rule base. The template defines the reference and offset direction of the action position of the target executor type. The target executor type can be any executor type. Position calculations are performed in batches according to actuator type. The multi-stage speed change positions of the molding machine and the extruder are directly calculated based on the corresponding rule templates. The action trigger positions of each molding valve are generated by calling the preset molding valve position calculation submodule. The calculated actuator positions are uniformly sorted and logically verified according to their sequence along the pipe axis. If logical conflicts occur, adjustments are made according to preset priority rules. The calculation of the multi-speed positions of the molding machine and extruder, as well as the activation trigger position of at least one molding valve, also includes: The type of each forming valve and its functional role in the flaring section control are obtained from the collaborative rule base. The types include at least a normal inflation valve for pipe forming, an inner layer inflation valve for inner layer support, a flaring venting valve for flaring section shaping, and an inner layer vacuum valve for inner layer adsorption forming. Based on the functional role of each molding valve, the action offset relative to the flaring start point or flaring end point is matched from the collaborative rule base. The opening position of the normal inflation valve and the inner layer inflation valve is located before the flaring start point, and the opening position of the flaring deflation valve is located after the flaring end point. Based on the start and end positions of the flared section and the action offset, calculate the opening and closing positions of each forming valve during the start-up process; The set air pressure value for inner layer inflation is obtained, and the segmented air pressure adjustment rules for the inner layer inflation valve at different positions in the flare section are obtained from the collaborative rule base. Based on the set air pressure value and the segmented air pressure adjustment rules, the base air pressure value of the inner layer inflation valve before the start of the flare section, the intermediate air pressure value during the passage of the flare section, and the end pressure boost value after the end of the flare section are generated.

2. The method according to claim 1, characterized in that, The calculation of the multi-speed positions of the molding machine and extruder, as well as the activation trigger position of at least one molding valve, also includes: Based on the characteristics of the flaring forming process, the flaring section and the areas before and after the flaring section are divided into multiple sub-regions with different control objectives. The sub-regions include the pre-inflation zone in front of the flaring section for establishing air pressure, the main forming zone inside the flaring section for forming, and the post-forming zone behind the flaring section for shaping and cooling. For each sub-region, different offset sets are defined according to the control objectives of the sub-region. The offset of the pre-inflated zone is used to control the early opening of each forming valve to establish a stable air pressure. The offset of the main forming zone is used to control the speed adjustment of the extruder and forming machine to ensure the flaring forming quality. The offset of the post-forming zone is used to control the opening of the venting valve and vacuum valve to avoid damaging the formed part. Based on the function type of each actuator and its role in the control of the flared section, determine the sub-region to which it belongs and select the offset set of the corresponding sub-region. Based on the offset set of the selected sub-regions and the start and end positions of the flared section, calculate the trigger positions of all actions of each actuator during the power-on process to ensure that the actuator actions in different sub-regions match the control target of the region.

3. The method according to claim 1, characterized in that, The method further includes dynamically optimizing the offsets in the collaborative rule base, specifically including: Multiple successful production cases are obtained from the historical parameter database. Each successful production case includes the start and end positions of the flared section and the actual action trigger positions of each actuator during the production process. For the target offset in the collaborative rule base, the actual value corresponding to the target offset is extracted from each of the successful production cases. The actual value is obtained by subtracting the corresponding flare start point or flare end point from the actual action trigger position of the actuator in the successful production case. Statistical analysis is performed on all extracted actual values. After removing outliers that exceed the preset reasonable range, the arithmetic mean or median of the remaining actual values ​​is calculated as the optimized candidate value of the target offset. The target offset in the collaborative rule base is updated to the optimization candidate value, or the target offset is updated after a weighted fusion of the optimization candidate value and the target offset.

4. The method according to claim 1, characterized in that, After generating the boot parameter set, the following steps are also included: Search the historical parameter database for at least one successful case that matches the unit length weight of the pipe and the start and end positions of the flared section of the current production task. The matching criteria are that the relative deviation of the unit length weight of the pipe does not exceed the first preset threshold and the absolute deviation of the start and end positions of the flared section does not exceed the second preset threshold. Extract the final set of historical startup parameters from the successful cases found in the search. The set of historical startup parameters includes the speed and position of the extruder, the speed and position of the molding machine, and the action position and pressure parameters of each molding valve. The boot parameter set is merged with the historical boot parameter set. During merging, the weight of each parameter is determined according to the matching degree between the current task and the successful case. The higher the matching degree, the greater the weight of the parameter in the historical boot parameter set. The fused parameter set is output to the production line control system as the final startup parameter set, and after this production is successful, the final parameter set used is stored in the historical parameter database as a new success case.

5. A computer system comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1-4.

6. A computer-readable storage medium having a computer program / instructions stored thereon, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method described in any one of claims 1-4.

7. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method described in any one of claims 1-4.

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