Intelligent control system for surface grinding after wood-plastic auxiliary frame forming

Abstract

The invention belongs to the technical field of wood-plastic auxiliary frame polishing control, and particularly discloses and provides a wood-plastic auxiliary frame formed surface polishing intelligent control system which comprises the steps that the rough polishing texture direction of a wood-plastic auxiliary frame surface flat part and a decorative rib part is determined by recognizing the stress damage direction of each flaw area of a wood-plastic auxiliary frame; the method comprises the following steps: detecting the defect degrees of a surface flat part and a decorative rib part of a wood-plastic auxiliary frame, determining the coarse grinding abrasive paper specification, the coarse grinding texture direction and the coarse grinding pressure of the corresponding part, further identifying a coarse grinding effect index, and determining the decreasing granularity of the thickness specification of the corresponding grinding abrasive paper of the surface flat part and the decorative rib part; the adaptive grinding pressure is determined by recognizing the frame contours of the inner corner area, the outer corner area and the groove area; and selecting the polishing sequence with the optimal effect evaluation coefficient by simulating the structure effect evaluation coefficient and the polishing operation change complex coefficient under each polishing sequence condition.

Description

Technical Field

[0001] The invention belongs to the technical field of wood-plastic auxiliary frame polishing control, and relates to an intelligent control system for polishing the surface of a wood-plastic auxiliary frame after molding. Background Art

[0002] In today's building materials industry, wood-plastic composite materials, as an emerging environmentally friendly material, are gradually occupying an important position in the field of building decoration with their unique advantages, such as environmental protection, energy saving, recyclability and good physical and mechanical properties. As one of the important applications of wood-plastic composite materials, wood-plastic frames are widely used in building components such as doors, windows, curtain walls, etc. due to their unique texture and functionality. However, there are still many challenges and shortcomings in the surface treatment of wood-plastic frames after molding, especially in surface grinding control. For example, there is a lack of flexibility in processing complex shape areas. The surface quality of wood-plastic frames directly affects its overall aesthetics and performance. If there are burrs or unevenness on the surface, it will not only affect the appearance quality of the product, but may also cause safety hazards during use. Therefore, how to effectively control the grinding of the surface of the wood-plastic frame after molding has become a key link in improving product quality and market competitiveness.

[0003] In the prior art, there are also some related solutions involving the detailed processing mode of grinding control, for example, the Chinese invention patent application for a grinding equipment control method, system and grinding equipment with announcement number CN113199348B, which determines the real-time force information of the target position where the end effector is located during the grinding process, and determines the speed information of the grinding motor based on the real-time force information, and then controls the grinding motor to drive the end effector to grind the grinding object in a constant position grinding mode based on the speed information and target position information of the grinding motor, thereby realizing constant position grinding. Since the real-time force information of the end effector is allowed to change during the grinding process, the constant position grinding mode can be realized.

[0004] Although the above scheme proposes some solutions to the detailed processing mode of grinding control, there are still the following limitations: 1. The current technology does not consider the stress damage direction of the defective area of ​​the wood-plastic frame when performing grinding control, which makes the control parameter setting during the grinding operation incomplete, which may affect the subsequent actual grinding effect.

[0005] 2. The existing grinding technology is insufficient in recognizing the contours of detail areas, which may make the setting of operating parameters unreliable, and the grinding sequence of detail areas is not optimized and screened, which may affect the overall grinding effect and production efficiency. Summary of the invention

[0006] In view of this, in order to solve the problems raised in the above background technology, an intelligent control system for surface polishing of a wood-plastic frame after molding is proposed.

[0007] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides an intelligent control system for polishing the surface of a wood-plastic auxiliary frame after molding, the system comprising: a rough polishing data setting module: used to divide the flat part and the decorative line part of the surface of the wood-plastic auxiliary frame, detect the surface defect state of the wood-plastic auxiliary frame, and determine the rough polishing data, the rough polishing data including sandpaper specifications, texture direction, and polishing pressure.

[0008] Rough grinding effect analysis module: used to detect the rough grinding effect and determine the rough grinding decreasing particle size of the flat part and the decorative line part of the wood-plastic frame surface.

[0009] Detail area recognition module: used to delineate each detail area, including inner corner area, outer corner area, and groove area.

[0010] Fine grinding parameter analysis module: used to identify the frame outline of each detail area from the wood-plastic frame texture frame model and determine the appropriate grinding parameters for each detail area.

[0011] Polishing sequence analysis module: used to simulate the implementation of different polishing sequences for each detail area and determine the fine polishing sequence for the detail area.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention determines the rough grinding texture direction of the flat part and the decorative line part of the surface of the wood-plastic auxiliary frame by identifying the stress damage direction of each defective area of ​​the wood-plastic auxiliary frame, that is, starting from the end where the stress is concentrated, gradually grinding along the direction of stress transfer, which can ensure that the stress generated during the grinding process is reasonably released and avoid new stress concentration and damage.

[0013] (2) The present invention can ensure that the grinding effect is neither excessive nor too light by detecting the degree of defects on the flat part and the decorative line part of the surface of the wood-plastic auxiliary frame, determining the rough grinding sandpaper specifications, rough grinding texture direction and rough grinding pressure of the corresponding parts, and then identifying the rough grinding effect index, and determining the decreasing particle size of the coarse and fine specifications of the corresponding grinding sandpaper for the flat part and the decorative line part of the surface, so as to gradually refine the roughness of the wood-plastic auxiliary frame surface, thereby improving the grinding accuracy.

[0014] (3) The present invention identifies the frame contours of the inner corner area, the outer corner area and the groove area and determines the appropriate grinding pressure, thereby avoiding the structural contours of these detail areas being destroyed or insufficiently polished due to improper control of the grinding pressure.

[0015] (4) By simulating the structural effect evaluation coefficient and the grinding operation change complexity coefficient under various grinding sequences, the present invention can intuitively understand the impact of each sequence on the quality of the final product, and then select the grinding sequence with the optimal effect evaluation coefficient, which can ensure that the detail area is properly processed during the fine grinding process, thereby improving the grinding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the connection of the system modules of the present invention.

[0018] Figure 2 It is a schematic diagram of the wood-plastic frame texture model of the present invention.

[0019] Figure 3 It is a schematic diagram of the detail area of ​​the present invention.

[0020] Figure numerals: 1. defect area of ​​the flat surface part, 2. thickness line, 3. arc line, 4. inner corner area, 5. groove area. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 As shown, the present invention provides an intelligent control system for surface polishing after wood-plastic frame molding, the system includes: a rough polishing data setting module, a rough polishing effect analysis module, a detail area recognition module, a fine polishing parameter analysis module, and a polishing sequence analysis module.

[0023] The rough grinding data setting module is connected to the rough grinding effect analysis module, the rough grinding effect analysis module is connected to the detail area recognition module, the detail area recognition module is connected to the fine grinding parameter analysis module, and the fine grinding parameter analysis module is connected to the grinding sequence analysis module.

[0024] The rough grinding data setting module is used to divide the flat part and the decorative line part of the wood-plastic frame surface, detect the surface defect state of the wood-plastic frame, and determine the rough grinding data, which includes sandpaper specifications, texture direction, and grinding pressure.

[0025] See also Figure 2 As shown, in a preferred embodiment, the detection of the surface defect state of the WPC auxiliary frame includes: extracting the texture frame model of the WPC auxiliary frame, extracting the frame texture of the flat part and the decorative line part, obtaining the texture features corresponding to each defect type preset in the WPC auxiliary frame, identifying each defect area and its defect type and degree on the flat part and the decorative line part of the WPC auxiliary frame surface based on edge detection technology, including fracture or notch area, scratch area, and recording each defect area of ​​the flat part as each undulating area, and recording each defect area of ​​the decorative line part as each degraded area, and obtaining the defect degree of each undulating area and each degraded area.

[0026] The degree of defects in each undulating area and each deteriorated area is further compared with the preset defect benchmark degree. If the degree of defects in a certain undulating area or a certain deteriorated area exceeds the preset defect benchmark degree, an irregular warning is issued for the wood-plastic frame. If the degree of defects in each undulating area and each deteriorated area does not exceed the preset defect benchmark degree, the rough grinding data is determined.

[0027] The flat portion refers to a relatively smooth area of ​​the WPC frame without any special shape or concave-convex texture.

[0028] The defect degree refers to the ratio between the defect texture feature of the defect type to which the defect area belongs and the preset reference texture feature of the corresponding defect type. The defect texture feature includes defect area, defect depth, etc.

[0029] In a further preferred embodiment, the rough sanding data is determined in the following manner: the degree of defects of each undulating area and each degraded area is matched with the appropriate defect degree range corresponding to each preset sandpaper specification, the adapted sandpaper specification of each undulating area and each degraded area is determined, the finest grain sandpaper specification adapted to each undulating area and each degraded area is selected by comparison, and determined as the rough sandpaper specification for the flat part and the decorative line part of the surface of the wood-plastic frame.

[0030] The sandpaper specification refers to the coarse and fine grain size of the sandpaper. The grain size of the sandpaper is expressed by "mesh". The larger the mesh number, the higher the number of abrasive grains per unit area of ​​the sandpaper, the smaller the abrasive particles, and the finer the sandpaper grain size.

[0031] By acquiring infrared images of each undulating area and each degraded area, and based on the principle that the infrared image of the damaged area has darker chrominance, the stress damage path of each undulating area and each degraded area is marked. The stress direction to which it belongs is the stress damage direction, such as the derived direction of the fiber breaking point and the derived direction of the cracking path, and the stress damage direction of each undulating area and each degraded area is obtained.

[0032] The stress direction of the stress damage path starts from the darkest position and extends to the lighter position.

[0033] Damage weights are set for various stress damage directions, and the rough grinding texture directions of the flat part and the decorative line part of the WPC frame surface are determined.

[0034] Obtain the corresponding defect degree of the defect area belonging to the finest grain sandpaper specification adapted in each undulating area and each deteriorated area from the defect degree of each undulating area and each deteriorated area , and extract the expected value of comprehensive polishing of the flat part and decorative line part of the wood-plastic frame surface , determine the rough sanding pressure for flat parts and decorative line parts , , where The unit condition assessment coefficient preset for the wood-plastic frame corresponds to the basic grinding pressure. The preset reference defect level.

[0035] The expected comprehensive polishing value of the flat part and the decorative line part of the WPC auxiliary frame surface is determined by parameters such as the burr amount, the cumulative fluctuation amplitude of the concave-convex points, etc. Exemplarily, the frame contours of the flat part and the decorative line part of the WPC auxiliary frame surface are obtained from the WPC auxiliary frame texture framework model, and compared with the standard frame contours of the corresponding flat part and the decorative line part in the preset standard texture framework model of the WPC auxiliary frame. Based on the preset texture features corresponding to the burrs and concave-convex points, the burr amount and the cumulative fluctuation amplitude of the concave-convex points of the flat part of the WPC auxiliary frame surface are identified from the WPC auxiliary frame texture framework model, and compared with the preset reference burr amount and the reference cumulative fluctuation amplitude of the concave-convex points respectively. After obtaining the two ratios, they are accumulated to obtain the expected comprehensive polishing value of the flat part of the WPC auxiliary frame surface. In this way, the expected comprehensive polishing value of the decorative line part of the WPC auxiliary frame surface is obtained in the same way.

[0036] In a further preferred embodiment, the rough grinding texture direction of the flat part and the decorative line part of the WPC auxiliary frame surface is determined by the following process: setting damage weights for various stress damage directions, obtaining corresponding damage weights of the stress damage directions of each undulating area and each deteriorated area, and then accumulating the damage weights of various stress damage directions to obtain the damage accumulation weights of various stress damage directions in the flat part and the decorative line part of the WPC auxiliary frame surface.

[0037] The stress damage directions of the undulating areas and degraded areas belonging to the finest sandpaper specifications adapted in each undulating area and each degraded area are extracted from the stress damage directions, and weights are assigned to the stress damage directions, which are then accumulated to the damage accumulation weights of the corresponding stress damage directions in the flat part and the decorative line part of the WPC frame surface, and the comprehensive damage weights of various stress damage directions in the flat part and the decorative line part of the WPC frame surface are obtained. After further comparison, the stress damage direction with the maximum comprehensive damage weight in the flat part and the decorative line part of the WPC frame surface is screened out, and recorded as the rough grinding texture direction of the flat part and the decorative line part of the WPC frame surface.

[0038] The present invention determines the rough grinding texture direction of the flat part and the decorative line part of the surface of the wood-plastic auxiliary frame by identifying the stress damage direction of each defective area of ​​the wood-plastic auxiliary frame, and then performs sequential grinding according to the direction of the stress damage, that is, starting from one end where the stress is concentrated, and gradually grinding along the direction of stress transmission, which can ensure that the stress generated in the grinding process is reasonably released, avoid new stress concentration and damage, and further reduce the rework and scrap rate caused by improper defect handling, which is helpful to reduce production costs and improve production efficiency.

[0039] The rough grinding effect analysis module is used to detect the rough grinding effect and determine the rough grinding decreasing granularity of the flat part and the decorative line part of the wood-plastic frame surface.

[0040] In a preferred embodiment, the determination of the decreasing granularity of the rough grinding of the flat part and the decorative line part of the WPC auxiliary frame surface is specifically as follows: according to the identification method of the comprehensive grinding expected value of the flat part and the decorative line part of the WPC auxiliary frame surface, similarly obtain the comprehensive grinding expected value of the flat part and the decorative line part of the WPC auxiliary frame surface after rough grinding, obtain the inverse ratio of the comprehensive grinding expected value to the preset reference grinding expected value, and record it as the rough grinding effect index of the flat part and the decorative line part of the WPC auxiliary frame surface .

[0041] Determine the decreasing grain size of the sandpaper for the flat part and decorative line of the WPC frame surface , , The preset unit rough grinding effect index corresponds to the particle size reduction, and then the rough grinding operation is performed for a specified number of times on the flat part and the decorative line part of the wood-plastic frame surface according to the decreasing particle size.

[0042] It should be noted that during the processing of wood-plastic materials, by gradually reducing the sanding force and performing multiple sanding, the burrs and uneven textures on the surface can be removed more carefully. Multiple sanding helps to control the sanding depth and avoid the phenomenon of uneven surface of the material caused by excessive sanding at one time. If a large sanding force is used at the beginning, it may cause excessive wear of the material surface and even further deepen the defects in the defective areas.

[0043] The present invention can ensure that the grinding effect is neither excessive nor too light by detecting the degree of defects on the flat part and the decorative line part of the surface of the wood-plastic auxiliary frame, determining the rough grinding sandpaper specifications, rough grinding texture direction and rough grinding pressure of the corresponding parts, and then identifying the rough grinding effect index, and determining the decreasing particle size of the coarse and fine specifications of the corresponding grinding sandpaper of the surface flat part and the decorative line part accordingly, so as to gradually refine the roughness of the wood-plastic auxiliary frame surface, thereby improving the grinding accuracy.

[0044] The detail region recognition module is used to delineate each detail region, and each detail region includes an inner corner region, an outer corner region, and a groove region.

[0045] The inner corner area refers to the edge seam of the hollow cavity in the wood-plastic frame.

[0046] The outer corner area refers to the outer seam where the wood-plastic frame is connected to other parts.

[0047] The groove area refers to the decorative line concave and convex seam.

[0048] The fine grinding parameter analysis module is used to identify the frame contour of each detail area from the wood-plastic frame texture frame model, and determine the adaptive grinding parameters of each detail area, where the adaptive grinding parameters are adaptive grinding pressure.

[0049] See also Figure 3 As shown, in a preferred embodiment, the determination of the adaptive grinding parameters of each detail area includes: identifying the burr amount of the inner corner area from the frame contour of each detail area, multiplying it with the preset unit burr amount corresponding to the grinding amplification pressure to obtain the adaptive grinding pressure of the inner corner area, and then using the grinding sandpaper to perform a grinding operation on the inner corner area of ​​the wood-plastic frame with the adaptive grinding pressure.

[0050] The frame contour of the outer corner area is obtained from the frame contours of each detail area, and the matching grinding pressure of the outer corner area is determined.

[0051] The frame contour of the groove area is obtained from the frame contours of each detail area, and the suitable grinding pressure of the groove area is determined.

[0052] In a further preferred embodiment, the adaptive grinding pressure of the outer corner region is obtained by: identifying the thickness line and arc line of the outer corner region from the frame contour of the outer corner region, extracting the thickness of the thickness line and the curvature of the arc The connection point between the arc line and the thickness line is recorded as the sharp corner position, and then the structural transition strength of the sharp corner position of the frame contour in the outer corner area is analyzed. , where Indicates the preset reference thickness of the thickness line. It represents the preset reference curvature of the arc line, and e is a natural constant.

[0053] Specifically, the greater the curvature of the arc line, the sharper the frame profile at the corner point, and thus the easier it is to be damaged during the grinding process, and thus the weaker the structural transition strength.

[0054] Determine the outer corner area Suitable grinding pressure , where Indicates the preset basic sanding pressure for fine sanding of the WPC frame.

[0055] In a further preferred embodiment, the adaptive grinding pressure analysis content of the groove area includes: extracting the unit delineated side area of ​​the groove area from the frame outline of the groove area, and extracting the unit contact area of ​​the groove area with the grinding sandpaper when grinding at a preset angle, and obtaining the corresponding ratio between the unit delineated side area of ​​the groove area and the grinding sandpaper. If the ratio is within a first-class contact rich threshold range, the grinding sandpaper is kept perpendicular to the surface; if the ratio is within a second-class contact deficient threshold range, the grinding pressure inclination angle of the grinding sandpaper and the groove area is adjusted to increase the contact area of ​​the inclined surface.

[0056] The first-class contact rich threshold range and the second-class contact lack threshold range are both preset values.

[0057] Further, according to the rough grinding effect index identification method of the flat part and the decorative line part of the wood-plastic frame surface, the groove area is obtained in the same way. Rough grinding effect index , determine the appropriate grinding pressure for the groove area , where Indicates the contact situation within the contact rich threshold range of a type of contact, Indicates the contact situation within the threshold range of the second-class contact deficiency. It represents the influence weight of grinding pressure adaptation under the contact condition belonging to a contact rich threshold range, It represents the influence weight of grinding pressure adaptation under the contact condition within the second type contact deficiency threshold range, .

[0058] The present invention identifies the frame contours of the inner corner area, the outer corner area and the groove area and determines the suitable grinding pressure, thereby avoiding the structural contours of these detail areas being destroyed or insufficiently polished due to improper control of the grinding pressure. Specifically, the adaptive grinding pressure is determined by identifying the amount of burrs in the inner corner area to avoid incomplete burr removal due to insufficient pressure or damage to the corners due to excessive pressure. This precise adaptation ensures the accuracy of the grinding process, so that the burrs in the corner area can be effectively and not excessively processed; the adaptive grinding pressure is determined by identifying the structural transition strength of the sharp corner position of the outer corner area. Excessive grinding pressure can easily cause damage to the inner corner area, such as corner wear and deformation. Therefore, grinding with an adaptive grinding pressure can maximize the protection of the integrity of the workpiece at the sharp corner position; the groove area is usually a key part of the structural part, and its quality directly affects the stability and safety of the overall structure. By identifying the contact area of ​​the inner side of the groove area to determine the adaptive grinding pressure and adjust the inclination angle of the grinding pressure, improper grinding caused by insufficient contact force between the groove area and the grinding equipment can be avoided, thereby ensuring that the quality of the groove area meets the design requirements, thereby improving the stability and reliability of the overall structure.

[0059] The polishing sequence analysis module is used to simulate the implementation of different polishing sequences for each detail area and determine the fine polishing sequence for the detail area.

[0060] In a preferred embodiment, the content of the grinding sequence analysis module includes: simulating the implementation operations of each detail area according to different grinding sequences through scene simulation software, deriving the structural damage indicators of all detail areas under each grinding sequence, obtaining the corresponding inverse proportional values ​​of the preset reference values ​​of the corresponding structural damage indicators, and summing them to obtain the structural effect evaluation coefficients under each grinding sequence.

[0061] The structural damage indicators include the grinding strength of the overlapping area of ​​the wood-plastic frame and the bending, fracture and deformation damage amplitude of each detail area.

[0062] In a further preferred embodiment, the order of fine grinding of the detail area is specifically determined by: deriving the angle variation range of the grinding equipment passing through all detail areas in each grinding order from the scene simulation software , path change range , Pressure variation , detect the complexity coefficient of the grinding operation change under each grinding sequence , where Indicates the preset angle change range, path change range, and pressure change range corresponding to the reference value. Indicates setting constants, such as , A number indicating the grinding sequence. , Indicates the number of grinding sequences.

[0063] The structural effect evaluation coefficient and the complexity coefficient of the grinding operation change under each grinding sequence are normalized and calculated to obtain the operation priority weight of each grinding sequence. The grinding sequence with the maximum operation priority weight is compared and screened out, and marked as the fine grinding sequence of the detail area.

[0064] The present invention analyzes the operation priority weight of each polishing sequence by simulating the structural effect evaluation coefficient and the polishing operation change complexity coefficient under each polishing sequence. The influence of each sequence on the quality of the final product can be intuitively understood, and then the polishing sequence with the optimal effect evaluation coefficient can be selected to ensure that the detail area is properly processed during the fine polishing process, thereby improving the polishing quality.

[0065] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. An intelligent control system for surface polishing after wood-plastic frame molding, characterized in that: The system includes: Rough grinding data setting module: used to divide the flat part and the decorative line part of the wood-plastic frame surface, detect the surface defect status of the wood-plastic frame, and determine the rough grinding data; Rough grinding effect analysis module: used to detect the rough grinding effect and determine the rough grinding decreasing granularity of the flat part and the decorative line part of the wood-plastic frame surface; Detail area recognition module: used to delineate each detail area, including inner corner area, outer corner area, and groove area; Fine grinding parameter analysis module: used to identify the frame outline of each detail area and determine the appropriate grinding parameters for each detail area; Polishing sequence analysis module: used to simulate the implementation of different polishing sequences for each detail area and determine the fine polishing sequence for the detail area.

2. According to claim 1, the intelligent control system for surface polishing after wood-plastic frame molding is characterized in that: The method for detecting the surface defect state of the wood-plastic auxiliary frame includes: extracting a texture frame model of the wood-plastic auxiliary frame, extracting frame textures of a flat part and a decorative line part, obtaining texture features corresponding to various defect types preset in the wood-plastic auxiliary frame, identifying various defect areas of a flat part and a decorative line part on the surface of the wood-plastic auxiliary frame and their defect types and defect degrees, recording various defect areas of the flat part as undulating areas, and recording various defect areas of the decorative line part as degraded areas, and obtaining the defect degrees of each undulating area and each degraded area.

3. According to claim 2, the intelligent control system for surface polishing after the wood-plastic frame is formed is characterized in that: The specific method of determining the rough grinding data is as follows: matching the defect degree of each undulating area and each deteriorated area with the appropriate defect degree range corresponding to each preset sandpaper specification, determining the suitable sandpaper specification of each undulating area and each deteriorated area, comparing and screening out the finest grain sandpaper specification suitable for each undulating area and each deteriorated area, and determining the rough grinding sandpaper specification of the flat part and the decorative line part of the wood-plastic frame surface; By acquiring infrared images of each undulating area and each degraded area, the stress damage paths of each undulating area and each degraded area are marked, and the stress direction to which they belong is the stress damage direction, and the stress damage direction of each undulating area and each degraded area is obtained; Set damage weights for various stress damage directions and determine the rough grinding texture direction of the flat part and decorative line part of the WPC frame surface; Obtain the corresponding defect degree of the defect area belonging to the finest sandpaper specification suitable for each undulating area and each deteriorated area , and extract the expected value of comprehensive polishing of the flat part and decorative line part of the wood-plastic frame surface , determine the rough sanding pressure for flat parts and decorative line parts , , where The unit condition assessment coefficient preset for the wood-plastic frame corresponds to the basic grinding pressure. The preset reference defect level.

4. According to claim 3, the intelligent control system for surface polishing after the wood-plastic frame is formed is characterized in that: The process of determining the rough grinding texture direction of the flat part and the decorative line part of the WPC auxiliary frame is as follows: setting damage weights for various stress damage directions, obtaining corresponding damage weights of the stress damage directions of each undulating area and each deteriorated area, and then accumulating the damage weights of various stress damage directions to obtain the damage accumulation weights of various stress damage directions in the flat part and the decorative line part of the WPC auxiliary frame surface; The stress damage directions of the undulating areas and degraded areas belonging to the finest sandpaper specifications adapted in each undulating area and each degraded area are extracted, and weights are assigned to the stress damage directions, which are then accumulated to the damage accumulation weights of the corresponding stress damage directions in the flat part and decorative line part of the WPC frame surface, and the comprehensive damage weights of various stress damage directions in the flat part and decorative line part of the WPC frame surface are obtained. After further comparison, the stress damage directions with the maximum comprehensive damage weights in the flat part and decorative line part of the WPC frame surface are screened out, and recorded as the rough grinding texture directions of the flat part and decorative line part of the WPC frame surface.

5. According to claim 1, the intelligent control system for surface polishing after wood-plastic frame molding is characterized in that: The method of determining the decreasing granularity of the rough grinding of the flat part and the decorative line part of the WPC auxiliary frame surface is specifically as follows: obtaining the comprehensive grinding expected value after the rough grinding of the flat part and the decorative line part of the WPC auxiliary frame surface, obtaining the inverse ratio of the comprehensive grinding expected value to the preset reference grinding expected value, and recording it as the rough grinding effect index of the flat part and the decorative line part of the WPC auxiliary frame surface ; Determine the decreasing grain size of the sandpaper for the flat part and decorative line of the WPC frame surface , , The preset unit rough grinding effect index corresponds to the particle size reduction, and then the rough grinding operation is performed for a specified number of times on the flat part and the decorative line part of the wood-plastic frame surface according to the decreasing particle size.

6. The intelligent control system for surface polishing after forming a wood-plastic frame according to claim 1, characterized in that: Determining the adaptive grinding parameters of each detail area includes: identifying the burr amount of the inner corner area from the frame contour of each detail area, multiplying the burr amount by the preset grinding amplification pressure corresponding to the unit burr amount to obtain the adaptive grinding pressure of the inner corner area, and then using the grinding sandpaper to perform a grinding operation on the inner corner area of ​​the wood-plastic frame with the adaptive grinding pressure; Obtain the frame contour of the outer corner area and determine the suitable grinding pressure of the outer corner area; Obtain the frame outline of the groove area and determine the appropriate grinding pressure for the groove area.

7. The intelligent control system for surface polishing after forming a wood-plastic frame according to claim 6, characterized in that: The adaptive grinding pressure of the outer corner area is obtained by: identifying the thickness line and the arc line of the outer corner area from the frame contour of the outer corner area, extracting the thickness of the thickness line and the curvature of the arc line, recording the connection point position of the arc line and the thickness line as the sharp corner point position, and then analyzing the structural transition strength of the sharp corner point position of the frame contour of the outer corner area ; Determine the outer corner area Suitable grinding pressure , where Indicates the preset basic sanding pressure for fine sanding of the WPC frame.

8. The intelligent control system for surface polishing after forming a wood-plastic frame according to claim 7, characterized in that: The content of the adaptive grinding pressure analysis for determining the groove area includes: extracting the unit delineated side area of ​​the groove area from the frame contour of the groove area, and extracting the unit contact area of ​​the groove area when the grinding sandpaper is grinding at a preset angle, and obtaining the corresponding ratio of the unit delineated side area of ​​the groove area, if the ratio is within the first contact rich threshold range, keeping the grinding sandpaper perpendicular to the surface; if the ratio is within the second contact deficient threshold range, adjusting the grinding pressure inclination angle of the grinding sandpaper and the groove area; Get the groove area Rough grinding effect index , determine the appropriate grinding pressure for the groove area , where Indicates the contact situation within the contact rich threshold range of a type of contact, Indicates the contact situation within the threshold range of the second-class contact deficiency. It represents the influence weight of grinding pressure adaptation under the contact condition belonging to a contact rich threshold range, It represents the influence weight of grinding pressure adaptation under the contact condition within the second type contact deficiency threshold range, .

9. The intelligent control system for surface polishing after forming a wood-plastic frame according to claim 1, characterized in that: The grinding sequence analysis module includes: simulating the implementation of different grinding sequences in each detail area through scene simulation software, deriving the structural damage indicators of all detail areas under each grinding sequence, obtaining the corresponding inverse proportional value with the preset reference value of the corresponding structural damage indicator, and summing them to obtain the structural effect evaluation coefficient under each grinding sequence.

10. The intelligent control system for surface polishing after forming a wood-plastic frame according to claim 9, characterized in that: The determining of the fine grinding sequence of the detail area specifically comprises: deriving the angle change amplitude, path change amplitude, and pressure change amplitude of the grinding equipment passing through all detail areas under each grinding sequence, and detecting the grinding operation change complexity coefficient under each grinding sequence; The structural effect evaluation coefficient and the complexity coefficient of the grinding operation change under each grinding sequence are normalized and calculated to obtain the operation priority weight of each grinding sequence. The grinding sequence with the maximum operation priority weight is compared and screened out, and marked as the fine grinding sequence of the detail area.

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