PVC pipe production process control method and system

Abstract

The invention discloses a PVC pipe production process control method and system, and relates to the technical field of PVC pipe production control, and the method comprises the following steps: neutralizing static electricity in a pipe notch and an inner wall area by using a static electricity elimination nozzle through a third control parameter and a fourth control parameter, and sucking away cuttings in the pipe notch area by using a negative pressure vacuum cover, a high-voltage pulse device is used for purging cuttings in the inner wall area of the pipe, finally, the environmental influence index is eliminated through electrostatic cuttings in the surface area, the dynamic adjustment parameters of the conductive brush are optimized, the dynamic control parameters of the conductive brush are obtained, and the pipe blank is conveyed to a flaring machine through a traction machine by means of the dynamic control parameters of the conductive brush. The cutting chips on the surface of the initial pipe blank are removed, and the situation that in the PVC pipe cutting process, due to static electricity generated by friction and cutting, the cutting chips adhere to the surface of the pipe, the follow-up technological process is affected, and therefore the product appearance and connection and use of the pipe are affected is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of PVC pipe production control, and in particular to a PVC pipe production process control method and system. Background Art

[0002] PVC pipes are pipes made of polyvinyl chloride (PVC) plastic. They are widely used in water supply and drainage, construction, electricity, cable protection, agricultural irrigation and other fields due to their corrosion resistance, strong weather resistance, light weight and easy installation. According to different uses, PVC pipes can be divided into hard pipes and soft pipes. Hard pipes are mostly used in construction and industrial pipelines, while soft pipes are commonly used in gardening and agriculture. PVC pipes have a long service life and are lower in cost than metal pipes. They have widely replaced traditional metal pipe materials. The PVC pipe production process control system can optimize the production process and ensure the consistency and pass rate of pipe quality by real-time monitoring and intelligent adjustment of key parameters (such as temperature, pressure, speed, etc.).

[0003] During the cutting process of PVC pipes, static electricity generated by friction and cutting will cause cutting chips to adhere to the surface of the pipe, which not only affects the subsequent process flow, but may also affect the product appearance and the connection and use of the pipe. However, the chip removal method of the existing PVC pipe production process control system mainly relies on air flow blowing, which cannot completely eliminate the problem of chip adhesion caused by static electricity, and the operation is cumbersome and inefficient. Therefore, it is necessary to provide a PVC pipe production process control method and system to solve the above-mentioned problems. Summary of the invention

[0004] In order to solve the above technical problems, a PVC pipe production process control method and system are provided. This technical solution solves the problem that the chip removal method of the existing PVC pipe production process control system proposed in the above background technology mainly relies on air flow blowing and cannot completely eliminate the chip adhesion caused by static electricity.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A PVC pipe production process control method, comprising:

[0007] S100, obtaining pipe production demand information and pipe production equipment information, and determining pipe production raw material information, obtaining pipe production raw material ratio information based on the pipe production demand information and the pipe production raw material information, and uniformly mixing the pipe production raw materials according to the pipe production raw material ratio information to obtain mixed raw material information;

[0008] S200, based on a finite element analysis method, obtaining a mixed raw material quality index and a first control parameter through mixed raw material information and pipe production equipment information, and feeding the mixed raw material into an extruder to obtain an initial pipe blank and an initial pipe blank quality index set;

[0009] S300, determining a second control parameter according to the initial tube blank quality index set, and at the same time sending the initial tube blank to the cutting machine through a traction machine, and obtaining tube incision information, incision area static electricity accumulation value, incision area static electricity chip distribution information and incision area environment information, and then determining a third control parameter, and using an electrostatic neutralization device to neutralize static electricity in the incision area;

[0010] S400, based on the third control parameter and the pipe cutting information, chamfering is completed by using a pipe chamfering tool, and chips are sucked away by using a negative pressure vacuum hood;

[0011] S500, according to the initial tube blank quality index set and the second control parameter, the initial tube blank is transported to the expanding machine by using a traction machine, and the tube inner wall information, the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area and the inner wall area environment information are obtained, and then the fourth control parameter is determined, and the static electricity neutralization device is used to neutralize the inner wall area;

[0012] S600, using a high-voltage pulse device to blow away the electrostatic chips on the inner wall of the pipe to obtain a mid-term pipe embryo, and obtaining a set of mid-term pipe embryo quality indexes;

[0013] S700, determining a fifth control parameter according to the mid-term tube blank quality index set, and sending the mid-term tube blank into an oven for heating by turning over the rack to obtain a late-term tube blank, and obtaining the late-term tube blank quality index set at the same time;

[0014] S800, based on the quality index set of the later-stage pipe blank, determine the sixth control parameter, and send the later-stage pipe blank into the spray box through the overturning rack for cooling and molding, so as to obtain the PVC pipe.

[0015] Preferably, the method based on the finite element analysis method obtains the mixed raw material quality index and the first control parameter through the mixed raw material information and the pipe production equipment information, and feeds the mixed raw material into the extruder to obtain the initial pipe blank and the initial pipe blank quality index set, specifically including:

[0016] Based on the raw material information of pipe production, obtain the physical property information, chemical composition information and melt rheological property information of various raw materials for pipe production;

[0017] According to the physical property information, chemical composition information and melt rheological property information of various pipe production raw materials, the basic characteristic index corresponding to various pipe production raw materials is obtained;

[0018] Obtain the interaction index between each pipe production raw material, and obtain the mixed raw material quality index of the mixed raw materials by combining the basic characteristic indexes corresponding to the various pipe production raw materials;

[0019] Based on the mixed raw material information, obtain the thermal property information and mechanical property information of the mixed raw material;

[0020] Obtain the configuration information of the pipe production equipment through the pipe production equipment information, and determine the equipment operation status quality index matrix and the internal status parameters of the equipment;

[0021] Based on the finite element analysis method, the FEA simulation model is constructed using the thermal property information of the mixed raw materials, the mechanical property information, the equipment operation status quality index matrix and the internal state parameters of the equipment to obtain the melt information of the mixed raw materials in the extruder;

[0022] According to the melt information, the influencing factors of the pipe characteristics are obtained, and the first control parameters are determined;

[0023] Optimizing the extruder control command with the first control parameter, and setting the tube blank size information according to the tube production demand information;

[0024] The material output from the extruder is sized and cooled according to the tube blank size information to obtain an initial tube blank;

[0025] Collect the initial size information, initial surface quality information, initial strength information, initial material density information, sizing cooling effect information and internal stress information of the initial tube blank;

[0026] The initial size information, initial surface quality information, initial strength information, initial material density information, sizing cooling effect information and internal stress information are quantified to obtain a set of initial tube blank quality indexes.

[0027] Preferably, the second control parameter is determined according to the initial tube blank quality index set, and the initial tube blank is sent to the cutting machine by a tractor, and the tube incision information, the static electricity accumulation value of the incision area, the static electricity chip distribution information of the incision area and the environmental information of the incision area are obtained, and then the third control parameter is determined, and the static electricity neutralization device is used to neutralize the static electricity in the incision area, which specifically includes:

[0028] According to the initial tube blank quality index set, the traction parameter influencing factor is obtained, and the second control parameter is determined;

[0029] The second control parameter is used to optimize the traction machine control instruction, and the initial tube blank is sent to the cutting machine through the traction machine control instruction;

[0030] Collect the incision morphology information, incision flatness information and edge quality information of the initial tube blank to obtain the tube incision information;

[0031] The static electricity accumulation value of the incision area is measured by using an electrostatic chip scanner to obtain the static electricity accumulation value of the incision area;

[0032] Obtaining the cutting surface information of the initial tube blank, and determining the center position of the cut section of the initial tube blank by using the cutting surface information;

[0033] A three-dimensional space coordinate system is constructed with the center position of the cut section of the initial tube blank as the origin;

[0034] Based on the static electricity accumulation value of the incision area, determining the position information of the incision area and the static electricity chip distribution information of the incision area in a three-dimensional space coordinate system;

[0035] The incision area is divided according to the incision area position information and the electrostatic chip distribution information of the incision area to obtain an electrostatic chip dense distribution area and an electrostatic chip dispersed distribution area;

[0036] Based on the three-dimensional space coordinate system, the center point position information of the electrostatic chip dense distribution area and the electrostatic chip dispersed distribution area is determined;

[0037] According to the environmental information of the cutting area, the center point position information of the electrostatic chip dense distribution area and the electrostatic chip dispersed distribution area, the environmental impact index of the electrostatic chip elimination in the cutting area is determined;

[0038] Determine the position information of the static neutralization device, and determine the position information of the static elimination nozzle based on the position information of the static neutralization device;

[0039] According to the center point position information of the electrostatic chip dense distribution area, the center point position information of the electrostatic chip dispersed distribution area and the position information of the electrostatic elimination nozzle, the dynamic distance for eliminating the electrostatic chip dense point, the dynamic distance for eliminating the electrostatic chip dispersed point, the dynamic angle for eliminating the electrostatic chip dense point and the dynamic angle for eliminating the electrostatic chip dispersed point are determined;

[0040] Based on the environmental impact index of electrostatic chip elimination in the incision area, the dynamic distance for eliminating electrostatic chip concentration points, the dynamic distance for eliminating electrostatic chip dispersion points, the dynamic angle for eliminating electrostatic chip concentration points, and the dynamic angle for eliminating electrostatic chip dispersion points, the moving parameters of the electrostatic elimination nozzle are determined;

[0041] According to the environmental impact index of electrostatic chip elimination in the incision area, the static accumulation value in the incision area, the area where electrostatic chips are densely distributed and the area where electrostatic chips are dispersedly distributed, the ion injection parameters of the static elimination nozzle are determined;

[0042] determining a third control parameter based on the static elimination nozzle movement parameter and the static elimination nozzle ion ejection parameter;

[0043] The static electricity neutralization device is adjusted by using the third control parameter to neutralize the static electricity in the incision area.

[0044] Preferably, the method comprises: according to the initial tube blank quality index set and the second control parameter, using a traction machine to transport the initial tube blank to the expanding machine, and obtaining the tube inner wall information, the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area and the inner wall area environment information, and then determining the fourth control parameter, and using the static electricity neutralization device to neutralize the static electricity of the inner wall area, specifically comprising:

[0045] The control instruction of the tractor is adjusted by using the second control parameter, and the initial tube blank is sent to the expanding machine by using the adjusted control instruction of the tractor;

[0046] Collect the inner wall flatness information, inner wall smoothness information and inner wall size information of the initial tube blank to obtain the inner wall information of the tube;

[0047] The static electricity accumulation value of the inner wall area is measured by using an electrostatic chip scanner to obtain the static electricity accumulation value of the inner wall area;

[0048] Based on the inner wall information of the tube, the inner wall surface information of the initial tube blank is obtained, and the inner wall surface model is constructed based on the inner wall surface information;

[0049] Based on the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area is determined in the inner wall surface model;

[0050] The surface model is divided according to the electrostatic chip distribution information of the inner wall area to obtain the surface sub-model;

[0051] Determine the coordinate information of the center point of the surface sub-model in the three-dimensional space coordinate system;

[0052] Determine the electrostatic chip distribution information of the curved surface sub-model according to the coordinate information of the center point of the curved surface sub-model in the three-dimensional space coordinate system and the electrostatic chip distribution information of the inner wall area;

[0053] Based on the coordinate information of the center point of the curved surface sub-model in the three-dimensional space coordinate system and the position information of the static elimination nozzle, determine the distance value between the center point of each curved surface sub-model and the static elimination nozzle;

[0054] According to the distance value between the center point of each curved surface sub-model and the static elimination nozzle and the static chip distribution information of the curved surface sub-model, the dynamic distance of static chip elimination of the curved surface sub-model and the dynamic angle of static chip elimination of the curved surface sub-model are determined;

[0055] Based on the environmental information of the inner wall area and the coordinate information of the center point of the curved surface sub-model in the three-dimensional space coordinate system, the environmental impact index of electrostatic chip elimination of the curved surface sub-model is obtained;

[0056] Based on the surface sub-model electrostatic chip elimination environmental impact index, the surface sub-model electrostatic chip elimination dynamic distance and the surface sub-model electrostatic chip elimination dynamic angle, the curved surface sub-model electrostatic chip elimination nozzle movement parameters are determined;

[0057] According to the surface sub-model electrostatic chip elimination environmental impact index and the surface sub-model electrostatic chip distribution information, as well as the distance value between the center point of each surface sub-model and the electrostatic elimination nozzle, the ion injection parameter of the surface sub-model electrostatic elimination nozzle is determined;

[0058] Determine a fourth control parameter based on the curved surface sub-model static elimination nozzle movement parameter and the curved surface sub-model static elimination nozzle ion injection parameter;

[0059] The fourth control parameter is used to adjust the static neutralization device to neutralize the static electricity on the inner wall area.

[0060] Preferably, the method further comprises: according to the initial tube blank quality index set and the second control parameter, using a traction machine to transport the initial tube blank to the belling machine, and obtaining the tube inner wall information, the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area and the inner wall area environment information, and then determining the fourth control parameter, and using the static electricity neutralization device to neutralize the static electricity of the inner wall area.

[0061] Collecting the surface flatness information, surface smoothness information and surface size information of the initial tube blank to obtain the surface information of the tube;

[0062] The static electricity accumulation value of the surface area is measured by using an electrostatic chip scanner to obtain the static electricity accumulation value of the surface area;

[0063] Based on the surface information of the tube, the surface curve information of the initial tube blank is obtained, and the surface curve model is constructed based on the surface curve information;

[0064] Based on the static electricity accumulation value of the surface area, the static electricity chip distribution information of the surface area is determined in the surface curved surface model;

[0065] The surface model is divided according to the electrostatic chip distribution information of the surface area to obtain the upper surface sub-model and the lower surface sub-model;

[0066] Determine the global maximum point and the global minimum point of the upper surface sub-model and the lower surface sub-model in the three-dimensional space coordinate system;

[0067] Obtaining position information of the upper conductive brush and the lower conductive brush in the three-dimensional space coordinate system, and determining the distance value between the upper conductive brush and the global maximum point of the upper curved surface submodel, and the distance value between the lower conductive brush and the global minimum point of the lower curved surface submodel according to the global maximum point and the global minimum point of the upper curved surface submodel and the lower curved surface submodel in the three-dimensional space coordinate system;

[0068] Based on the distance value between the upper conductive brush and the global maximum point of the upper curved surface sub-model, the distance value between the lower conductive brush and the global minimum point of the lower curved surface sub-model, and the surface area electrostatic chip distribution information, the position information of the upper conductive brush and the lower conductive brush is dynamically adjusted, and the position information of the upper conductive brush and the lower conductive brush is recorded as the conductive brush dynamic adjustment parameter;

[0069] According to the global maximum point and the global minimum point of the upper surface sub-model and the lower surface sub-model in the three-dimensional space coordinate system, the surface area environmental information of the initial tube blank is collected, and the surface area electrostatic chip elimination environmental impact index is determined;

[0070] By eliminating the environmental impact index of electrostatic chips in the surface area, the dynamic adjustment parameters of the conductive brush are optimized to obtain the dynamic control parameters of the conductive brush;

[0071] By dynamically controlling the parameters of the conductive brush, the chips on the surface of the initial tube blank are removed during the process of the traction machine conveying the initial tube blank to the expanding machine.

[0072] Preferably, the method of using a high-voltage pulse device to blow away the electrostatic chips on the inner wall of the pipe to obtain a mid-term pipe blank and obtain a set of mid-term pipe blank quality indexes specifically includes:

[0073] Collect the mid-term inner wall cleanliness index, mid-term dimensional stability index, mid-term surface quality index, mid-term residual static chip quantity, mid-term static accumulation index and mid-term pipe physical performance index of the mid-term pipe blank;

[0074] A mid-term tube blank quality index set is constructed based on the mid-term inner wall cleanliness index, mid-term dimensional stability index, mid-term surface quality index, mid-term residual static chip quantity, mid-term static accumulation index and mid-term tube physical property index of the mid-term tube blank.

[0075] Preferably, the fifth control parameter is determined according to the mid-term tube blank quality index set, and the mid-term tube blank is sent into an oven for heating by turning the rack to obtain a late-term tube blank, and the late-term tube blank quality index set is obtained at the same time, specifically including:

[0076] The factors influencing rack turning and conveying are determined by the mid-term tube blank quality index set;

[0077] The fifth control parameter is determined by the rack turning and conveying influencing factor, and the rack turning is adjusted by the fifth control parameter to send the mid-stage tube blank into the oven for heating to obtain the late-stage tube blank;

[0078] Collect the later inner wall cleanliness index, later dimensional stability index, later surface quality index, later residual static chip quantity, later static accumulation index and later pipe physical performance index of the later pipe blank;

[0079] The quality index set of the later tube blank is constructed based on the later inner wall cleanliness index, later dimensional stability index, later surface quality index, later residual static chip quantity, later static accumulation index and later tube physical property index of the later tube blank.

[0080] Furthermore, a PVC pipe production process control system is proposed, which is used to implement any of the control methods described above, including:

[0081] A collection module, the collection module is used to obtain pipe production demand information and pipe production equipment information, and determine pipe production raw material information, collect initial size information, initial surface quality information, initial strength information, initial material density information, sizing cooling effect information and internal stress information of the initial pipe blank, collect incision morphology information, incision flatness information and edge quality information of the initial pipe blank to obtain pipe incision information, collect inner wall flatness information, inner wall smoothness information and inner wall size information of the initial pipe blank to obtain pipe inner wall information, collect surface flatness information, surface smoothness information and surface size information of the initial pipe blank to obtain pipe surface information, and collect mid-term inner wall cleanliness index, mid-term dimensional stability index, mid-term surface quality index, mid-term residual electrostatic chips quantity, mid-term electrostatic accumulation index and mid-term pipe physical property index of the mid-term pipe blank;

[0082] A main control module, which is used to receive the data and information transmitted by the acquisition module, and to process the data and information transmitted by the receiving unit. At the same time, based on the result of the data processing and based on the finite element analysis method, the FEA simulation model is constructed by using the thermal property information of the mixed raw material, the mechanical property information, the equipment operation state quality index matrix and the internal state parameters of the equipment. A three-dimensional space coordinate system is constructed with the center position of the cut section of the initial tube blank as the origin. Based on the inner wall information of the tube, the inner wall surface information of the initial tube blank is obtained, and the inner wall surface model is constructed with the inner wall surface information. The control parameters are also sent to the cleaning module and the tube production equipment;

[0083] A cleaning module, which is used to control the static neutralization device to neutralize the static electricity in the cutout area, inner wall area and surface area of ​​the tube blank, and control the high-voltage pulse device and the conductive brush to clean the chips in the cutout area, inner wall area and surface area of ​​the tube blank;

[0084] A display module is provided with a control panel and a display screen for operators to monitor the PVC pipe production process.

[0085] Preferably, the main control module includes:

[0086] A receiving unit, the receiving unit is used to receive data and information transmitted by the acquisition module;

[0087] A data processing unit, the data processing unit is used to process the data and information transmitted by the receiving unit;

[0088] A model building unit, the model building unit is used to build an FEA simulation model based on a finite element analysis method, using the thermal property information of the mixed raw material, the mechanical property information, the equipment operation state quality index matrix and the internal state parameters of the equipment, build a three-dimensional space coordinate system with the center position of the cut section of the initial tube blank as the origin, obtain the inner wall surface information of the initial tube blank based on the inner wall information of the tube, and build an inner wall surface model with the inner wall surface information;

[0089] An instruction issuing unit is used to issue control parameters to the clearing module and the pipe production equipment.

[0090] Preferably, the clearing module comprises:

[0091] An electrostatic neutralization unit, the electrostatic neutralization unit is used to control the electrostatic neutralization device to neutralize the electrostatic charge on the cutout area, the inner wall area and the surface area of ​​the tube blank;

[0092] A chip removal unit is used to control the removal of chips from the cut area, inner wall area and surface area of ​​the high-voltage pulse device and the conductive brush tube blank.

[0093] Compared with the prior art, the present invention has the following beneficial effects:

[0094] The present invention proposes a PVC pipe production process control method and system, which obtains pipe cut information, cut area static accumulation value, cut area static chip distribution information and cut area environmental information, and then determines a third control parameter, uses a static neutralization device to neutralize static electricity in the cut area, and then obtains pipe inner wall information, inner wall area static accumulation value, inner wall area static chip distribution information and inner wall area environmental information, and then determines a fourth control parameter, uses a static neutralization device to neutralize static electricity in the inner wall area, and uses the third control parameter and the fourth control parameter to eliminate static electricity in the pipe cut and inner wall area using a static elimination nozzle. Static electricity is neutralized, and the chips in the pipe cutting area are sucked away by a negative pressure vacuum hood, and the chips in the inner wall area of ​​the pipe are purged by a high-voltage pulse device. Finally, the environmental impact index of static electricity chips in the surface area is eliminated, and the dynamic adjustment parameters of the conductive brush are optimized to obtain the dynamic control parameters of the conductive brush. The dynamic control parameters of the conductive brush are used to complete the removal of chips on the surface of the initial pipe blank during the traction machine transporting the initial pipe blank to the expanding machine, so as to avoid the static electricity generated by friction and cutting during the cutting process of the PVC pipe, which causes the chips to adhere to the surface of the pipe, affecting the subsequent process flow, thereby affecting the product appearance and the connection and use of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] Figure 1 This is a flow chart of a PVC pipe production process control method proposed by the present invention;

[0096] Figure 2 This is a flow chart of using the third control parameter to neutralize static electricity in the cut area in the present invention;

[0097] Figure 3 This is a flow chart of using the fourth control parameter to neutralize static electricity in the inner wall area in the present invention;

[0098] Figure 4 This is a system framework diagram of a PVC pipe production process control system proposed by the present invention. DETAILED DESCRIPTION

[0099] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0100] Reference Figure 1 - Figure 4 As shown, a PVC pipe production process control method comprises:

[0101] S100, obtaining pipe production demand information and pipe production equipment information, and determining pipe production raw material information, obtaining pipe production raw material ratio information based on the pipe production demand information and the pipe production raw material information, and uniformly mixing the pipe production raw materials according to the pipe production raw material ratio information to obtain mixed raw material information;

[0102] S200, based on a finite element analysis method, obtaining a mixed raw material quality index and a first control parameter through mixed raw material information and pipe production equipment information, and feeding the mixed raw material into an extruder to obtain an initial pipe blank and an initial pipe blank quality index set;

[0103] S300, determining a second control parameter according to the initial tube blank quality index set, and at the same time sending the initial tube blank to the cutting machine through a traction machine, and obtaining tube incision information, incision area static electricity accumulation value, incision area static electricity chip distribution information and incision area environment information, and then determining a third control parameter, and using an electrostatic neutralization device to neutralize static electricity in the incision area;

[0104] S400, based on the third control parameter and the pipe cutting information, chamfering is completed by using a pipe chamfering tool, and chips are sucked away by using a negative pressure vacuum hood;

[0105] S500, according to the initial tube blank quality index set and the second control parameter, the initial tube blank is transported to the expanding machine by using a traction machine, and the tube inner wall information, the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area and the inner wall area environment information are obtained, and then the fourth control parameter is determined, and the static electricity neutralization device is used to neutralize the inner wall area;

[0106] S600, using a high-voltage pulse device to blow away the electrostatic chips on the inner wall of the pipe to obtain a mid-term pipe embryo, and obtaining a set of mid-term pipe embryo quality indexes;

[0107] S700, determining a fifth control parameter according to the mid-term tube blank quality index set, and sending the mid-term tube blank into an oven for heating by turning over the rack to obtain a late-term tube blank, and obtaining the late-term tube blank quality index set at the same time;

[0108] S800, based on the quality index set of the later-stage pipe blank, determine the sixth control parameter, and send the later-stage pipe blank into the spray box through the overturning rack for cooling and molding, so as to obtain the PVC pipe.

[0109] Specifically, the pipe production demand information includes pipe production size information, pipe production quantity information, etc. The pipe production equipment information includes the production equipment used in the pipe production process, such as extruders, cutting machines, traction machines, spray boxes, etc. The pipe production raw material information includes the raw materials required for PVC pipe production, such as PVC resins, plasticizers, etc. In the production process of PVC pipes, the pipe production raw material ratio information is a crucial factor affecting the performance of pipes (such as strength, toughness, corrosion resistance, anti-aging, etc.). The production ratio of PVC pipes will vary according to different application requirements (such as water supply pipes, drainage pipes, power pipes, industrial pipes, etc.). The mixed raw material information is the information generated by the mixture obtained by uniformly mixing the pipe production raw materials according to the pipe production raw material ratio information, including thermal property information and mechanical property information of the mixed raw materials, thermal property information such as specific heat capacity, thermal conductivity, etc., mechanical property information such as tensile strength, elastic modulus, etc.

[0110] Furthermore, based on the finite element analysis method, the mixed raw material quality index and the first control parameter are obtained through the mixed raw material information and the pipe production equipment information, and the mixed raw material is fed into the extruder to obtain the initial pipe blank and the initial pipe blank quality index set, which specifically includes:

[0111] Based on the raw material information of pipe production, obtain the physical property information, chemical composition information and melt rheological property information of various raw materials for pipe production;

[0112] According to the physical property information, chemical composition information and melt rheological property information of various pipe production raw materials, the basic characteristic index corresponding to various pipe production raw materials is obtained;

[0113] Obtain the interaction index between each pipe production raw material, and obtain the mixed raw material quality index of the mixed raw materials by combining the basic characteristic indexes corresponding to the various pipe production raw materials;

[0114] Based on the mixed raw material information, obtain the thermal property information and mechanical property information of the mixed raw material;

[0115] Obtain the configuration information of the pipe production equipment through the pipe production equipment information, and determine the equipment operation status quality index matrix and the internal status parameters of the equipment;

[0116] Based on the finite element analysis method, the FEA simulation model is constructed using the thermal property information of the mixed raw materials, the mechanical property information, the equipment operation status quality index matrix and the internal state parameters of the equipment to obtain the melt information of the mixed raw materials in the extruder;

[0117] According to the melt information, the influencing factors of the pipe characteristics are obtained, and the first control parameters are determined;

[0118] Optimizing the extruder control command with the first control parameter, and setting the tube blank size information according to the tube production demand information;

[0119] The material output from the extruder is sized and cooled according to the tube blank size information to obtain an initial tube blank;

[0120] Collect the initial size information, initial surface quality information, initial strength information, initial material density information, sizing cooling effect information and internal stress information of the initial tube blank;

[0121] The initial size information, initial surface quality information, initial strength information, initial material density information, sizing cooling effect information and internal stress information are quantified to obtain a set of initial tube blank quality indexes.

[0122] Specifically, the basic characteristic indexes corresponding to various pipe production raw materials include density, melt flow index, tensile strength, etc. of various pipe production raw materials. In the pipe production process, the interaction index between different raw materials is usually used to evaluate the mutual coordination and compatibility of various raw materials (such as plastics, metals, alloys, fillers, etc.) in the production process, as well as their impact on the performance of the final product. Therefore, the interaction index between each pipe production raw material refers to a measure of the interaction and synergistic effect between raw materials in the pipe production process, usually including chemical compatibility, physical property coordination, etc. The mixed raw material quality index is a measure of the comprehensive quality of the material formed by mixing different raw materials, including raw material uniformity, physical properties, chemical stability, etc.

[0123] The calculation formula of the basic characteristic index is:

[0124]

[0125] In the formula, CFI is the basic characteristic index, ρ is the density corresponding to each pipe production raw material, MFI is the melt flow index corresponding to each pipe production raw material, σ t is the tensile strength of each pipe material, σ c is the compressive strength corresponding to each raw material for pipe production, CTE is the thermal expansion coefficient corresponding to each raw material for pipe production, λ is the thermal conductivity corresponding to each raw material for pipe production, w ρ 、w MFI , w CTE and w λ They are the weight coefficients of density, melt flow index, tensile strength, compressive strength, thermal expansion coefficient and thermal conductivity corresponding to each pipe production raw material;

[0126] The calculation formula for the interaction index between raw materials for pipe production is:

[0127] II=w1C chem +w2C phys +w3C mech +w4C process ;

[0128] Where, II is the interaction index between raw materials for pipe production, C chem is the coefficient of chemical compatibility, C phys is the coefficient of physical property matching, C mech is the synergy coefficient of mechanical properties, C process is the interaction influence coefficient in the processing process, w1, w2, w3 and w4 are the weights of each factor;

[0129] The calculation formula of mixed raw material quality index is:

[0130]

[0131] Where BRMQI is the mixed raw material quality index, C uni is the uniformity coefficient of the mixed raw materials, C phyl is the physical property matching degree of the mixed raw materials, C che is the chemical stability of the mixed raw materials, C mec is the mechanical properties of the mixed raw materials, C pro is the processing performance of the mixed raw materials, μ1 to μ5 are weight coefficients, ∑CFI is the sum of the basic characteristic indexes of all production raw materials, and ∑II is the interaction index between all pipe production raw materials;

[0132] It can be understood that the coefficient of chemical compatibility (such as a value between 0 and 1, the closer to 1, the better the compatibility), the coefficient of physical property matching (such as the matching of density, melting point, etc.), the synergy coefficient of mechanical properties (such as the matching of tensile strength, compressive strength and other properties), the interaction influence coefficient in the processing process (such as the matching of thermal expansion, thermal conductivity, etc.), w1, w2, w3 and w4 are the weights of each factor, indicating the degree of influence of different factors on the final interaction index, and the setting of weights is usually determined according to actual production needs.

[0133] It can also be understood that the initial size information, initial surface quality information, initial strength information, initial material density information, sizing cooling effect information and internal stress information are quantified to obtain the initial tube blank quality index set. For example, the initial size information can be quantified using the formula Where L is the length of the tube blank, D is the outer diameter, and T is the wall thickness, then C 尺寸 It can be used as the first element in the initial tube blank quality index set.

[0134] Further, according to the initial tube blank quality index set, the second control parameter is determined, and the initial tube blank is sent to the cutting machine through the traction machine, and the tube incision information, the static electricity accumulation value of the incision area, the static electricity chip distribution information of the incision area and the environmental information of the incision area are obtained, and then the third control parameter is determined, and the static electricity neutralization device is used to neutralize the static electricity in the incision area, which specifically includes:

[0135] According to the initial tube blank quality index set, the traction parameter influencing factor is obtained, and the second control parameter is determined;

[0136] The second control parameter is used to optimize the traction machine control instruction, and the initial tube blank is sent to the cutting machine through the traction machine control instruction;

[0137] Collect the incision morphology information, incision flatness information and edge quality information of the initial tube blank to obtain the tube incision information;

[0138] The static electricity accumulation value of the incision area is measured by using an electrostatic chip scanner to obtain the static electricity accumulation value of the incision area;

[0139] Obtaining the cutting surface information of the initial tube blank, and determining the center position of the cut section of the initial tube blank by using the cutting surface information;

[0140] A three-dimensional space coordinate system is constructed with the center position of the cut section of the initial tube blank as the origin;

[0141] Based on the static electricity accumulation value of the incision area, determining the position information of the incision area and the static electricity chip distribution information of the incision area in a three-dimensional space coordinate system;

[0142] The incision area is divided according to the incision area position information and the electrostatic chip distribution information of the incision area to obtain an electrostatic chip dense distribution area and an electrostatic chip dispersed distribution area;

[0143] Based on the three-dimensional space coordinate system, the center point position information of the electrostatic chip dense distribution area and the electrostatic chip dispersed distribution area is determined;

[0144] According to the environmental information of the cutting area, the center point position information of the electrostatic chip dense distribution area and the electrostatic chip dispersed distribution area, the environmental impact index of the electrostatic chip elimination in the cutting area is determined;

[0145] Determine the position information of the static neutralization device, and determine the position information of the static elimination nozzle based on the position information of the static neutralization device;

[0146] According to the center point position information of the electrostatic chip dense distribution area, the center point position information of the electrostatic chip dispersed distribution area and the position information of the electrostatic elimination nozzle, the dynamic distance for eliminating the electrostatic chip dense point, the dynamic distance for eliminating the electrostatic chip dispersed point, the dynamic angle for eliminating the electrostatic chip dense point and the dynamic angle for eliminating the electrostatic chip dispersed point are determined;

[0147] Based on the environmental impact index of electrostatic chip elimination in the incision area, the dynamic distance for eliminating electrostatic chip concentration points, the dynamic distance for eliminating electrostatic chip dispersion points, the dynamic angle for eliminating electrostatic chip concentration points, and the dynamic angle for eliminating electrostatic chip dispersion points, the moving parameters of the electrostatic elimination nozzle are determined;

[0148] According to the environmental impact index of electrostatic chip elimination in the incision area, the static accumulation value in the incision area, the area where electrostatic chips are densely distributed and the area where electrostatic chips are dispersedly distributed, the ion injection parameters of the static elimination nozzle are determined;

[0149] determining a third control parameter based on the static elimination nozzle movement parameter and the static elimination nozzle ion ejection parameter;

[0150] The static electricity neutralization device is adjusted by using the third control parameter to neutralize the static electricity in the incision area.

[0151] Further, according to the initial tube blank quality index set and the second control parameter, the initial tube blank is transported to the expanding machine by a traction machine, and the tube inner wall information, the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area and the inner wall area environment information are obtained, and then the fourth control parameter is determined, and the static electricity neutralization device is used to neutralize the inner wall area, specifically including:

[0152] The control instruction of the tractor is adjusted by using the second control parameter, and the initial tube blank is sent to the expanding machine by using the adjusted control instruction of the tractor;

[0153] Collect the inner wall flatness information, inner wall smoothness information and inner wall size information of the initial tube blank to obtain the inner wall information of the tube;

[0154] The static electricity accumulation value of the inner wall area is measured by using an electrostatic chip scanner to obtain the static electricity accumulation value of the inner wall area;

[0155] Based on the inner wall information of the tube, the inner wall surface information of the initial tube blank is obtained, and the inner wall surface model is constructed based on the inner wall surface information;

[0156] Based on the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area is determined in the inner wall surface model;

[0157] The surface model is divided according to the electrostatic chip distribution information of the inner wall area to obtain the surface sub-model;

[0158] Determine the coordinate information of the center point of the surface sub-model in the three-dimensional space coordinate system;

[0159] Determine the electrostatic chip distribution information of the curved surface sub-model according to the coordinate information of the center point of the curved surface sub-model in the three-dimensional space coordinate system and the electrostatic chip distribution information of the inner wall area;

[0160] Based on the coordinate information of the center point of the curved surface sub-model in the three-dimensional space coordinate system and the position information of the static elimination nozzle, determine the distance value between the center point of each curved surface sub-model and the static elimination nozzle;

[0161] According to the distance value between the center point of each curved surface sub-model and the static elimination nozzle and the static chip distribution information of the curved surface sub-model, the dynamic distance of static chip elimination of the curved surface sub-model and the dynamic angle of static chip elimination of the curved surface sub-model are determined;

[0162] Based on the environmental information of the inner wall area and the coordinate information of the center point of the curved surface sub-model in the three-dimensional space coordinate system, the environmental impact index of electrostatic chip elimination of the curved surface sub-model is obtained;

[0163] Based on the surface sub-model electrostatic chip elimination environmental impact index, the surface sub-model electrostatic chip elimination dynamic distance and the surface sub-model electrostatic chip elimination dynamic angle, the curved surface sub-model electrostatic chip elimination nozzle movement parameters are determined;

[0164] According to the surface sub-model electrostatic chip elimination environmental impact index and the surface sub-model electrostatic chip distribution information, as well as the distance value between the center point of each surface sub-model and the electrostatic elimination nozzle, the ion injection parameter of the surface sub-model electrostatic elimination nozzle is determined;

[0165] Determine a fourth control parameter based on the curved surface sub-model static elimination nozzle movement parameter and the curved surface sub-model static elimination nozzle ion injection parameter;

[0166] The fourth control parameter is used to adjust the static neutralization device to neutralize the static electricity on the inner wall area.

[0167] Specifically, according to the initial tube blank quality index set, the pulling parameter influencing factor is obtained, and the second control parameter is determined. The pulling parameter influencing factor is the influencing factor of the pulling parameters (such as pulling speed, pulling force, pulling temperature, etc.) on the quality, performance, shape and size of the formed product (such as the tube blank) during the tube or metal forming process. Then the second control parameter is to dynamically adjust the pulling speed, pulling force, pulling temperature and other parameters according to the real-time quality evaluation of the tube blank (such as the change of BRMQI).

[0168] It can be understood that the static elimination nozzle movement parameters control how the nozzle moves during use, as well as the speed and path of the movement. The correct movement parameters can ensure the uniformity and efficiency of the static elimination process. The static elimination nozzle ion injection parameters include ion injection voltage, ion injection flow rate, etc. Similarly, the surface sub-model static elimination nozzle movement parameters and the static elimination nozzle movement parameters are similar in function, and the surface sub-model static elimination nozzle ion injection parameters and the static elimination nozzle ion injection parameters are similar in function.

[0169] Further, according to the initial tube blank quality index set and the second control parameter, the initial tube blank is transported to the expanding machine by a traction machine, and the tube inner wall information, the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area and the inner wall area environment information are obtained, and then the fourth control parameter is determined, and the static electricity neutralization device is used to neutralize the inner wall area, which also includes:

[0170] Collecting the surface flatness information, surface smoothness information and surface size information of the initial tube blank to obtain the surface information of the tube;

[0171] The static electricity accumulation value of the surface area is measured by using an electrostatic chip scanner to obtain the static electricity accumulation value of the surface area;

[0172] Based on the surface information of the tube, the surface curve information of the initial tube blank is obtained, and the surface curve model is constructed based on the surface curve information;

[0173] Based on the static electricity accumulation value of the surface area, the static electricity chip distribution information of the surface area is determined in the surface curved surface model;

[0174] The surface model is divided according to the electrostatic chip distribution information of the surface area to obtain the upper surface sub-model and the lower surface sub-model;

[0175] Determine the global maximum point and the global minimum point of the upper surface sub-model and the lower surface sub-model in the three-dimensional space coordinate system;

[0176] Obtaining position information of the upper conductive brush and the lower conductive brush in the three-dimensional space coordinate system, and determining the distance value between the upper conductive brush and the global maximum point of the upper curved surface submodel, and the distance value between the lower conductive brush and the global minimum point of the lower curved surface submodel according to the global maximum point and the global minimum point of the upper curved surface submodel and the lower curved surface submodel in the three-dimensional space coordinate system;

[0177] Based on the distance value between the upper conductive brush and the global maximum point of the upper curved surface sub-model, the distance value between the lower conductive brush and the global minimum point of the lower curved surface sub-model, and the surface area electrostatic chip distribution information, the position information of the upper conductive brush and the lower conductive brush is dynamically adjusted, and the position information of the upper conductive brush and the lower conductive brush is recorded as the conductive brush dynamic adjustment parameter;

[0178] According to the global maximum point and the global minimum point of the upper surface sub-model and the lower surface sub-model in the three-dimensional space coordinate system, the surface area environmental information of the initial tube blank is collected, and the surface area electrostatic chip elimination environmental impact index is determined;

[0179] By eliminating the environmental impact index of electrostatic chips in the surface area, the dynamic adjustment parameters of the conductive brush are optimized to obtain the dynamic control parameters of the conductive brush;

[0180] By dynamically controlling the parameters of the conductive brush, the chips on the surface of the initial tube blank are removed during the process of the traction machine conveying the initial tube blank to the expanding machine.

[0181] Specifically, the dynamic control parameters of the conductive brush include dynamic parameters for controlling the movement of the conductive brush, including the movement mode, contact mode, ion distribution, etc. of the conductive brush, and determine the global maximum and global minimum points of the upper surface sub-model and the lower surface sub-model in the three-dimensional space coordinate system. The global maximum point is for a function defined in a certain area. If the function value at this point is greater than or equal to the function value of all other points in the area, then the point is the global maximum point in the area. In other words, at the global maximum point, the value of the function is maximized over the entire definition domain. Similarly, if the function value of a point is less than or equal to the function value of all other points in the area, then the point is the global minimum point of the area. That is, the function value at this point is minimized over the entire definition domain.

[0182] Furthermore, a high-voltage pulse device is used to blow away the electrostatic chips on the inner wall of the pipe to obtain a mid-term pipe embryo, and a set of mid-term pipe embryo quality indexes are obtained, including:

[0183] Collect the mid-term inner wall cleanliness index, mid-term dimensional stability index, mid-term surface quality index, mid-term residual static chip quantity, mid-term static accumulation index and mid-term pipe physical performance index of the mid-term pipe blank;

[0184] A mid-term tube blank quality index set is constructed based on the mid-term inner wall cleanliness index, mid-term dimensional stability index, mid-term surface quality index, mid-term residual static chip quantity, mid-term static accumulation index and mid-term tube physical property index of the mid-term tube blank.

[0185] Further, according to the mid-term tube blank quality index set, the fifth control parameter is determined, and the mid-term tube blank is sent into the oven for heating by turning the rack to obtain the late tube blank, and the late tube blank quality index set is obtained at the same time, which specifically includes:

[0186] The factors influencing rack turning and conveying are determined by the mid-term tube blank quality index set;

[0187] The fifth control parameter is determined by the rack turning and conveying influencing factor, and the rack turning is adjusted by the fifth control parameter to send the mid-stage tube blank into the oven for heating to obtain the late-stage tube blank;

[0188] Collect the later inner wall cleanliness index, later dimensional stability index, later surface quality index, later residual static chip quantity, later static accumulation index and later pipe physical performance index of the later pipe blank;

[0189] The quality index set of the later tube blank is constructed based on the later inner wall cleanliness index, later dimensional stability index, later surface quality index, later residual static chip quantity, later static accumulation index and later tube physical property index of the later tube blank.

[0190] Furthermore, a PVC pipe production process control system is proposed, which is used to implement any of the control methods described above, including:

[0191] A collection module, the collection module is used to obtain the pipe production demand information and pipe production equipment information, and determine the pipe production raw material information, collect the initial size information, initial surface quality information, initial strength information, initial material density information, sizing cooling effect information and internal stress information of the initial pipe blank, collect the incision morphology information, incision flatness information and edge quality information of the initial pipe blank to obtain the pipe incision information, collect the inner wall flatness information, inner wall smoothness information and inner wall size information of the initial pipe blank to obtain the pipe inner wall information, collect the surface flatness information, surface smoothness information and surface size information of the initial pipe blank to obtain the pipe surface information, collect the mid-term inner wall cleanliness index, mid-term dimensional stability index, mid-term surface quality index, mid-term residual electrostatic chips quantity, mid-term electrostatic accumulation index and mid-term pipe physical property index of the mid-term pipe blank;

[0192] The main control module is used to receive the data and information transmitted by the acquisition module, and to process the data and information transmitted by the receiving unit. At the same time, based on the results of data processing and based on the finite element analysis method, the FEA simulation model is constructed using the thermal property information of the mixed raw materials, the mechanical property information, the equipment operation status quality index matrix and the internal state parameters of the equipment. The three-dimensional space coordinate system is constructed with the center position of the cut section of the initial tube blank as the origin. Based on the inner wall information of the tube, the inner wall surface information of the initial tube blank is obtained, and the inner wall surface model is constructed with the inner wall surface information. The control parameters are also sent to the cleaning module and the tube production equipment;

[0193] The cleaning module is used to control the static neutralization device to neutralize the static electricity in the cut area, inner wall area and surface area of ​​the tube blank, and control the high-voltage pulse device and the conductive brush to clean the chips in the cut area, inner wall area and surface area of ​​the tube blank;

[0194] Display module: the display module is provided with a control panel and a display screen, and is used by operators to monitor the PVC pipe production process.

[0195] Furthermore, the main control module includes:

[0196] A receiving unit, the receiving unit is used to receive data and information transmitted by the acquisition module;

[0197] A data processing unit, the data processing unit is used to process the data and information transmitted by the receiving unit;

[0198] The model building unit is used to build a FEA simulation model based on the finite element analysis method, using the thermal property information of the mixed raw materials, the mechanical property information, the equipment operation state quality index matrix and the internal state parameters of the equipment, and to build a three-dimensional space coordinate system with the center position of the cut section of the initial tube blank as the origin. Based on the inner wall information of the tube, the inner wall surface information of the initial tube blank is obtained, and the inner wall surface model is built with the inner wall surface information;

[0199] The instruction sending unit is used to send control parameters to the cleaning module and the pipe production equipment.

[0200] Furthermore, the clearing module includes:

[0201] The static neutralization unit is used to control the static neutralization device to neutralize the static electricity on the cut area, inner wall area and surface area of ​​the tube blank;

[0202] The chip removal unit is used to control the removal of chips from the cut area, inner wall area and surface area of ​​the high-voltage pulse device and the conductive brush tube blank.

[0203] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A PVC pipe production process control method, characterized in that: include: S100, obtaining pipe production demand information and pipe production equipment information, and determining pipe production raw material information, obtaining pipe production raw material ratio information based on the pipe production demand information and the pipe production raw material information, and uniformly mixing the pipe production raw materials according to the pipe production raw material ratio information to obtain mixed raw material information; S200, based on a finite element analysis method, obtaining a mixed raw material quality index and a first control parameter through mixed raw material information and pipe production equipment information, and feeding the mixed raw material into an extruder to obtain an initial pipe blank and an initial pipe blank quality index set; S300, determining a second control parameter according to the initial tube blank quality index set, and at the same time sending the initial tube blank to the cutting machine through a traction machine, and obtaining tube incision information, incision area static electricity accumulation value, incision area static electricity chip distribution information and incision area environment information, and then determining a third control parameter, and using an electrostatic neutralization device to neutralize static electricity in the incision area; S400, based on the third control parameter and the pipe cutting information, chamfering is completed by using a pipe chamfering tool, and chips are sucked away by using a negative pressure vacuum hood; S500, according to the initial tube blank quality index set and the second control parameter, the initial tube blank is transported to the expanding machine by using a traction machine, and the tube inner wall information, the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area and the inner wall area environment information are obtained, and then the fourth control parameter is determined, and the static electricity neutralization device is used to neutralize the inner wall area; S600, using a high-voltage pulse device to blow away the electrostatic chips on the inner wall of the pipe to obtain a mid-term pipe embryo, and obtaining a set of mid-term pipe embryo quality indexes; S700, determining a fifth control parameter according to the mid-term tube blank quality index set, and sending the mid-term tube blank into an oven for heating by turning over the rack to obtain a late-term tube blank, and obtaining the late-term tube blank quality index set at the same time; S800, based on the quality index set of the later-stage pipe blank, determine the sixth control parameter, and send the later-stage pipe blank into the spray box through the overturning rack for cooling and molding, so as to obtain the PVC pipe.

2. A PVC pipe production process control method according to claim 1, characterized in that: The method based on the finite element analysis method obtains the mixed raw material quality index and the first control parameter through the mixed raw material information and the pipe production equipment information, and feeds the mixed raw material into the extruder to obtain the initial pipe blank and the initial pipe blank quality index set, specifically including: Based on the raw material information of pipe production, obtain the physical property information, chemical composition information and melt rheological property information of various raw materials for pipe production; According to the physical property information, chemical composition information and melt rheological property information of various pipe production raw materials, the basic characteristic index corresponding to various pipe production raw materials is obtained; Obtain the interaction index between each pipe production raw material, and obtain the mixed raw material quality index of the mixed raw materials by combining the basic characteristic indexes corresponding to the various pipe production raw materials; Based on the mixed raw material information, obtain the thermal property information and mechanical property information of the mixed raw material; Obtain the configuration information of the pipe production equipment through the pipe production equipment information, and determine the equipment operation status quality index matrix and the internal status parameters of the equipment; Based on the finite element analysis method, the FEA simulation model is constructed using the thermal property information of the mixed raw materials, the mechanical property information, the equipment operation status quality index matrix and the internal state parameters of the equipment to obtain the melt information of the mixed raw materials in the extruder; According to the melt information, the influencing factors of the pipe characteristics are obtained, and the first control parameters are determined; Optimizing the extruder control command with the first control parameter, and setting the tube blank size information according to the tube production demand information; The material output from the extruder is sized and cooled according to the tube blank size information to obtain an initial tube blank; Collect the initial size information, initial surface quality information, initial strength information, initial material density information, sizing cooling effect information and internal stress information of the initial tube blank; The initial size information, initial surface quality information, initial strength information, initial material density information, sizing cooling effect information and internal stress information are quantified to obtain a set of initial tube blank quality indexes.

3. A PVC pipe production process control method according to claim 2, characterized in that: The second control parameter is determined according to the initial tube blank quality index set, and the initial tube blank is sent to the cutting machine by the traction machine, and the tube incision information, the static electricity accumulation value of the incision area, the static electricity chip distribution information of the incision area and the environmental information of the incision area are obtained, and then the third control parameter is determined, and the static electricity neutralization device is used to neutralize the static electricity in the incision area, which specifically includes: According to the initial tube blank quality index set, the traction parameter influencing factor is obtained, and the second control parameter is determined; The second control parameter is used to optimize the traction machine control instruction, and the initial tube blank is sent to the cutting machine through the traction machine control instruction; Collect the incision morphology information, incision flatness information and edge quality information of the initial tube blank to obtain the tube incision information; The static electricity accumulation value of the incision area is measured by using an electrostatic chip scanner to obtain the static electricity accumulation value of the incision area; Obtaining the cutting surface information of the initial tube blank, and determining the center position of the cut section of the initial tube blank by using the cutting surface information; A three-dimensional space coordinate system is constructed with the center position of the cut section of the initial tube blank as the origin; Based on the static electricity accumulation value of the incision area, determining the position information of the incision area and the static electricity chip distribution information of the incision area in a three-dimensional space coordinate system; The incision area is divided according to the incision area position information and the electrostatic chip distribution information of the incision area to obtain an electrostatic chip dense distribution area and an electrostatic chip dispersed distribution area; Based on the three-dimensional space coordinate system, the center point position information of the electrostatic chip dense distribution area and the electrostatic chip dispersed distribution area is determined; According to the environmental information of the cutting area, the center point position information of the electrostatic chip dense distribution area and the electrostatic chip dispersed distribution area, the environmental impact index of the electrostatic chip elimination in the cutting area is determined; Determine the position information of the static neutralization device, and determine the position information of the static elimination nozzle based on the position information of the static neutralization device; According to the center point position information of the electrostatic chip dense distribution area, the center point position information of the electrostatic chip dispersed distribution area and the position information of the electrostatic elimination nozzle, the dynamic distance for eliminating the electrostatic chip dense point, the dynamic distance for eliminating the electrostatic chip dispersed point, the dynamic angle for eliminating the electrostatic chip dense point and the dynamic angle for eliminating the electrostatic chip dispersed point are determined; Based on the environmental impact index of electrostatic chip elimination in the incision area, the dynamic distance for eliminating electrostatic chip concentration points, the dynamic distance for eliminating electrostatic chip dispersion points, the dynamic angle for eliminating electrostatic chip concentration points, and the dynamic angle for eliminating electrostatic chip dispersion points, the moving parameters of the electrostatic elimination nozzle are determined; According to the environmental impact index of electrostatic chip elimination in the incision area, the static accumulation value in the incision area, the area where electrostatic chips are densely distributed and the area where electrostatic chips are dispersedly distributed, the ion injection parameters of the static elimination nozzle are determined; determining a third control parameter based on the static elimination nozzle movement parameter and the static elimination nozzle ion ejection parameter; The static electricity neutralization device is adjusted by using the third control parameter to neutralize the static electricity in the incision area.

4. A PVC pipe production process control method according to claim 3, characterized in that: The method comprises: according to the initial tube blank quality index set and the second control parameter, using a traction machine to transport the initial tube blank to the expanding machine, and obtaining the tube inner wall information, the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area and the inner wall area environment information, and then determining the fourth control parameter, and using the static electricity neutralization device to neutralize the static electricity of the inner wall area, specifically including: The control instruction of the tractor is adjusted by using the second control parameter, and the initial tube blank is sent to the expanding machine by using the adjusted control instruction of the tractor; Collect the inner wall flatness information, inner wall smoothness information and inner wall size information of the initial tube blank to obtain the inner wall information of the tube; The static electricity accumulation value of the inner wall area is measured by using an electrostatic chip scanner to obtain the static electricity accumulation value of the inner wall area; Based on the inner wall information of the tube, the inner wall surface information of the initial tube blank is obtained, and the inner wall surface model is constructed based on the inner wall surface information; Based on the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area is determined in the inner wall surface model; The surface model is divided according to the electrostatic chip distribution information of the inner wall area to obtain the surface sub-model; Determine the coordinate information of the center point of the surface sub-model in the three-dimensional space coordinate system; Determine the electrostatic chip distribution information of the curved surface sub-model according to the coordinate information of the center point of the curved surface sub-model in the three-dimensional space coordinate system and the electrostatic chip distribution information of the inner wall area; Based on the coordinate information of the center point of the curved surface sub-model in the three-dimensional space coordinate system and the position information of the static elimination nozzle, determine the distance value between the center point of each curved surface sub-model and the static elimination nozzle; According to the distance value between the center point of each curved surface sub-model and the static elimination nozzle and the static chip distribution information of the curved surface sub-model, the dynamic distance of static chip elimination of the curved surface sub-model and the dynamic angle of static chip elimination of the curved surface sub-model are determined; Based on the environmental information of the inner wall area and the coordinate information of the center point of the curved surface sub-model in the three-dimensional space coordinate system, the environmental impact index of electrostatic chip elimination of the curved surface sub-model is obtained; Based on the surface sub-model electrostatic chip elimination environmental impact index, the surface sub-model electrostatic chip elimination dynamic distance and the surface sub-model electrostatic chip elimination dynamic angle, the curved surface sub-model electrostatic chip elimination nozzle movement parameters are determined; According to the surface sub-model electrostatic chip elimination environmental impact index and the surface sub-model electrostatic chip distribution information, as well as the distance value between the center point of each surface sub-model and the electrostatic elimination nozzle, the ion injection parameter of the surface sub-model electrostatic elimination nozzle is determined; Determine a fourth control parameter based on the curved surface sub-model static elimination nozzle movement parameter and the curved surface sub-model static elimination nozzle ion injection parameter; The fourth control parameter is used to adjust the static neutralization device to neutralize the static electricity on the inner wall area.

5. A PVC pipe production process control method according to claim 4, characterized in that: The method further comprises: according to the initial tube blank quality index set and the second control parameter, using a traction machine to transport the initial tube blank to the expanding machine, and obtaining the tube inner wall information, the static electricity accumulation value of the inner wall area, the static electricity chip distribution information of the inner wall area and the inner wall area environment information, thereby determining the fourth control parameter, and using the static electricity neutralization device to neutralize the static electricity of the inner wall area. Collecting the surface flatness information, surface smoothness information and surface size information of the initial tube blank to obtain the surface information of the tube; The static electricity accumulation value of the surface area is measured by using an electrostatic chip scanner to obtain the static electricity accumulation value of the surface area; Based on the surface information of the tube, the surface curve information of the initial tube blank is obtained, and the surface curve model is constructed based on the surface curve information; Based on the static electricity accumulation value of the surface area, the static electricity chip distribution information of the surface area is determined in the surface curved surface model; The surface model is divided according to the electrostatic chip distribution information of the surface area to obtain the upper surface sub-model and the lower surface sub-model; Determine the global maximum point and the global minimum point of the upper surface sub-model and the lower surface sub-model in the three-dimensional space coordinate system; Obtaining position information of the upper conductive brush and the lower conductive brush in the three-dimensional space coordinate system, and determining the distance value between the upper conductive brush and the global maximum point of the upper curved surface submodel, and the distance value between the lower conductive brush and the global minimum point of the lower curved surface submodel according to the global maximum point and the global minimum point of the upper curved surface submodel and the lower curved surface submodel in the three-dimensional space coordinate system; Based on the distance value between the upper conductive brush and the global maximum point of the upper curved surface sub-model, the distance value between the lower conductive brush and the global minimum point of the lower curved surface sub-model, and the surface area electrostatic chip distribution information, the position information of the upper conductive brush and the lower conductive brush is dynamically adjusted, and the position information of the upper conductive brush and the lower conductive brush is recorded as the conductive brush dynamic adjustment parameter; According to the global maximum point and the global minimum point of the upper surface sub-model and the lower surface sub-model in the three-dimensional space coordinate system, the surface area environmental information of the initial tube blank is collected, and the surface area electrostatic chip elimination environmental impact index is determined; By eliminating the environmental impact index of electrostatic chips in the surface area, the dynamic adjustment parameters of the conductive brush are optimized to obtain the dynamic control parameters of the conductive brush; By dynamically controlling the parameters of the conductive brush, the chips on the surface of the initial tube blank are removed during the process of the traction machine conveying the initial tube blank to the expanding machine.

6. A PVC pipe production process control method according to claim 5, characterized in that: The method of using a high-voltage pulse device to blow away the electrostatic chips on the inner wall of the pipe to obtain a mid-term pipe embryo and obtain a mid-term pipe embryo quality index set specifically includes: Collect the mid-term inner wall cleanliness index, mid-term dimensional stability index, mid-term surface quality index, mid-term residual static chip quantity, mid-term static accumulation index and mid-term pipe physical performance index of the mid-term pipe blank; A mid-term tube blank quality index set is constructed based on the mid-term inner wall cleanliness index, mid-term dimensional stability index, mid-term surface quality index, mid-term residual static chip quantity, mid-term static accumulation index and mid-term tube physical property index of the mid-term tube blank.

7. A PVC pipe production process control method according to claim 6, characterized in that: The fifth control parameter is determined according to the mid-term tube blank quality index set, and the mid-term tube blank is sent into the oven for heating by turning the rack to obtain the late-term tube blank, and the late-term tube blank quality index set is obtained at the same time, specifically including: The factors influencing rack turning and conveying are determined by the mid-term tube blank quality index set; The fifth control parameter is determined by the rack turning and conveying influencing factor, and the rack turning is adjusted by the fifth control parameter to send the mid-stage tube blank into the oven for heating to obtain the late-stage tube blank; Collect the later inner wall cleanliness index, later dimensional stability index, later surface quality index, later residual static chip quantity, later static accumulation index and later pipe physical performance index of the later pipe blank; The quality index set of the later tube blank is constructed based on the later inner wall cleanliness index, later dimensional stability index, later surface quality index, later residual static chip quantity, later static accumulation index and later tube physical property index of the later tube blank.

8. A PVC pipe production process control system, used to implement the control method according to any one of claims 1 to 7, characterized in that: include: A collection module, the collection module is used to obtain pipe production demand information and pipe production equipment information, and determine pipe production raw material information, collect initial size information, initial surface quality information, initial strength information, initial material density information, sizing cooling effect information and internal stress information of the initial pipe blank, collect incision morphology information, incision flatness information and edge quality information of the initial pipe blank to obtain pipe incision information, collect inner wall flatness information, inner wall smoothness information and inner wall size information of the initial pipe blank to obtain pipe inner wall information, collect surface flatness information, surface smoothness information and surface size information of the initial pipe blank to obtain pipe surface information, and collect mid-term inner wall cleanliness index, mid-term dimensional stability index, mid-term surface quality index, mid-term residual electrostatic chips quantity, mid-term electrostatic accumulation index and mid-term pipe physical property index of the mid-term pipe blank; A main control module, which is used to receive the data and information transmitted by the acquisition module, and to process the data and information transmitted by the receiving unit. At the same time, based on the result of the data processing and based on the finite element analysis method, the FEA simulation model is constructed by using the thermal property information of the mixed raw material, the mechanical property information, the equipment operation state quality index matrix and the internal state parameters of the equipment. A three-dimensional space coordinate system is constructed with the center position of the cut section of the initial tube blank as the origin. Based on the inner wall information of the tube, the inner wall surface information of the initial tube blank is obtained, and the inner wall surface model is constructed with the inner wall surface information. The control parameters are also sent to the cleaning module and the tube production equipment; A cleaning module, which is used to control the static neutralization device to neutralize the static electricity in the cutout area, inner wall area and surface area of ​​the tube blank, and control the high-voltage pulse device and the conductive brush to clean the chips in the cutout area, inner wall area and surface area of ​​the tube blank; A display module is provided with a control panel and a display screen for operators to monitor the PVC pipe production process.

9. A PVC pipe production process control system according to claim 8, characterized in that: The main control module comprises: A receiving unit, the receiving unit is used to receive data and information transmitted by the acquisition module; A data processing unit, the data processing unit is used to process the data and information transmitted by the receiving unit; A model building unit, the model building unit is used to build an FEA simulation model based on a finite element analysis method, using the thermal property information of the mixed raw material, the mechanical property information, the equipment operation state quality index matrix and the internal state parameters of the equipment, build a three-dimensional space coordinate system with the center position of the cut section of the initial tube blank as the origin, obtain the inner wall surface information of the initial tube blank based on the inner wall information of the tube, and build an inner wall surface model with the inner wall surface information; An instruction issuing unit, wherein the instruction issuing unit is used to issue control parameters to the clearing module and the pipe production equipment.

10. A PVC pipe production process control system according to claim 8, characterized in that: The clearing module comprises: An electrostatic neutralization unit, the electrostatic neutralization unit is used to control the electrostatic neutralization device to neutralize the electrostatic charge on the cutout area, the inner wall area and the surface area of ​​the tube blank; A chip removal unit is used to control the removal of chips from the cut area, inner wall area and surface area of ​​the high-voltage pulse device and the conductive brush tube blank.

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