Three-component parallel composite fiber spinneret hole structure precision machining system and method

Abstract

The present application relates to the technical field of precision machining, in particular to a three-component parallel composite fiber spinneret hole structure precision machining system and method, comprising a reference identification positioning module, a collaborative path planning module, a multi-axis linkage precision machining module, a three-dimensional scanning detection module and a finishing compensation machining module; wherein: the reference identification positioning module identifies the preset reference center coordinates; the collaborative path planning module generates and outputs collaborative machining path data; the multi-axis linkage precision machining module processes the primary hole type and the interface transition zone of the three micro-holes; the three-dimensional scanning detection module scans and obtains the actual three-dimensional profile data of the processed area; and the finishing compensation machining module performs local compensation cutting on the micro-hole profile and the interface transition zone profile. Through unified positioning, collaborative machining and error compensation, the present application realizes high-precision forming of the spinneret hole structure and ensures uniform parallel and stable performance of the three-component composite fiber.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision machining, and particularly to a three-component parallel composite fiber spinneret hole structure precision machining system and method. BACKGROUND

[0002] Three-component parallel composite fibers are widely used in high-performance spinning and functional fiber preparation processes due to their multifunctional composite properties. The micro-hole structure and interface transition zone of the spinneret, as the core component of fiber forming, directly determine the distribution stability and interface bonding quality of the three-component fluid during the spinning process. However, the existing spinneret hole structure processing mostly uses single-hole independent processing and post-processing modification methods, which not only makes it difficult to ensure the spatial position accuracy of the three micro-holes, but also easily leads to uneven interface transition zone profile, thereby affecting the parallel uniformity of the three components of the fiber and the performance of the final product.

[0003] The existing technology has three main problems in the processing process: first, there is a lack of multi-hole positioning means based on overall reference coordinates, making it difficult to control the relative position error between micro-holes; second, the path planning and processing are often independent of each other, making it impossible to achieve coordinated processing of micro-holes and interface transition zones, resulting in large interface transition zone profile deviations; third, there is a lack of real-time three-dimensional detection after processing and error feedback-based compensation mechanism, resulting in insufficient consistency of the finished product. Therefore, there is an urgent need for a three-component parallel composite fiber spinneret hole structure precision machining system and method to solve the above problems. SUMMARY

[0004] Based on the above purpose, the present application provides a three-component parallel composite fiber spinneret hole structure precision machining system and method.

[0005] The three-component parallel composite fiber spinneret hole structure precision machining system comprises a reference identification and positioning module, a coordinated path planning module, a multi-axis linkage precision machining module, a three-dimensional scanning detection module, and a finishing and compensation machining module. Wherein:

[0006] The reference identification and positioning module is used to collect the image of the spinneret blank, identify and output the preset reference center coordinates of the three micro-hole machining units;

[0007] The coordinated path planning module is used to receive the preset reference center coordinates, generate and output coordinated machining path data containing the profiles of the three micro-holes and the interface transition zone according to the preset hole type parameters of the three-component parallel composite fiber;

[0008] The multi-axis linkage precision machining module is used to receive the coordinated machining path data and drive the machining spindle to perform three-dimensional motion to simultaneously machine the primary hole type of the three micro-holes and the interface transition zone on the spinneret blank;

[0009] A three-dimensional scanning detection module is configured to acquire actual three-dimensional profile data of the processed area in real time after primary hole type processing is completed;

[0010] A finishing compensation processing module is configured to receive the actual three-dimensional profile data, compare the actual three-dimensional profile data with ideal three-dimensional profile data in preset hole type parameters, generate and execute a finishing processing path, and perform local compensation cutting on the micro-hole profile and the interface transition zone profile, so as to finally process a spinneret product meeting design requirements.

[0011] Optionally, the reference identification and positioning module comprises an image acquisition unit, an edge extraction unit, a feature fitting unit and a center coordinate output unit, wherein:

[0012] The image acquisition unit is configured to acquire a spinneret blank surface image by a high-resolution industrial camera arranged above a spinneret processing platform;

[0013] The edge extraction unit is configured to perform gray scale enhancement and noise removal processing on the image obtained by the image acquisition unit, and perform edge detection operation by using a Canny operator to extract profile edge lines of micro-hole processing sites on the spinneret blank surface;

[0014] The feature fitting unit is configured to fit a standard circle profile of the edge of each group of micro-hole processing sites based on the least square method according to the edge profile output by the edge extraction unit, and extract the center position coordinates as initial reference coordinates;

[0015] The center coordinate output unit is configured to output the initial reference coordinates fitted by the three groups as a preset reference center coordinate set according to a set processing sequence.

[0016] Optionally, the cooperative path planning module comprises a hole type parameter reading unit, a profile construction unit, a path fusion unit and a path output unit, wherein:

[0017] The hole type parameter reading unit is configured to receive preset hole type parameters of the aperture, aspect ratio, taper angle and transition zone width corresponding to each group;

[0018] The profile construction unit is configured to generate a standard profile of three micro-holes and an interface transition zone profile model between adjacent holes in a three-dimensional space based on the preset reference center coordinates and in combination with the preset hole type parameters;

[0019] The path fusion unit is configured to perform path splicing and node reconstruction on the profile model of the three micro-holes and the interface region to generate a continuous and non-discontinuous cooperative processing path;

[0020] The path output unit is configured to convert the fused path into G code or interpolation format data.

[0021] Optionally, the profile construction unit comprises:

[0022] micropore profile generating subunit: for generating three sets of conical frustum micropore profiles in three-dimensional space with a preset reference center coordinate as the center point, combining the aperture , cone angle , aspect ratio and cone segment length of each component, and the profile taper meets: , wherein is the orifice diameter, is the hole bottom diameter;

[0023] interface transition zone modeling subunit: for calculating the minimum distance between the edges of adjacent micropore profiles according to the relative positions of the reference centers of the three sets of micropores, and constructing a curved surface profile with continuous curvature between adjacent micropores based on the minimum distance axis and the set transition zone width.

[0024] Optionally, the multi-axis linkage precision machining module comprises a path analysis unit, a motion control unit and a spindle coordination driving unit; wherein:

[0025] path analysis unit: for receiving the collaborative machining path data output by the collaborative path planning module, and analyzing to obtain the three-dimensional coordinate point sequence of each set of micropore profile and interface transition zone and its machining order information;

[0026] motion control unit: for converting the analyzed coordinate point sequence into corresponding axis interpolation motion instructions, generating corresponding multi-axis linkage control instruction set, including X, Y, Z three-axis position parameters and spindle speed instructions;

[0027] spindle coordination driving unit: for driving the configured multi-spindle system according to the multi-axis linkage control instruction set, so that the three machining spindles simultaneously feed along their respective paths in three-dimensional space, completing the collaborative machining operation of the primary hole type of the three micropores and the interface transition zone.

[0028] Optionally, the three-dimensional scanning detection module comprises a structured light projection unit, an image acquisition unit, a depth reconstruction unit and a profile data output unit; wherein:

[0029] structured light projection unit: for projecting structured light stripes with coded patterns onto the machined area, forming light intensity modulation distribution, covering the entire area of the three micropores and the interface transition zone;

[0030] image acquisition unit: for acquiring a sequence of reflected images modulated by structured light from a fixed view angle through a high-resolution camera, and extracting stripe shift information;

[0031] Depth reconstruction unit: used for calculating the spatial depth value corresponding to each image pixel based on the principle of triangulation according to the fringe offset and the geometric parameters between the camera / projector, and reconstructing a complete three-dimensional point cloud model;

[0032] Contour data output unit: used for extracting the actual three-dimensional contour of the micro-hole boundary and the transition zone from the three-dimensional point cloud model, and converting it into geometric data in a standard format.

[0033] Optionally, the depth reconstruction unit comprises:

[0034] Fringe offset extraction subunit: used for extracting phase change information from the reflection image sequence obtained by the image acquisition unit to obtain the fringe offset of each pixel;

[0035] View angle geometric modeling subunit: used for constructing a corresponding triangulation model according to the installation geometric relationship between the projector and the camera, and setting the baseline length, projection angle and imaging resolution parameters;

[0036] Spatial coordinate calculation subunit: used for calculating the spatial depth value corresponding to each image pixel point according to the fringe offset, the baseline length and the projection angle , and reconstructing the three-dimensional point cloud coordinates in combination with the pixel position .

[0037] Optionally, the finishing compensation processing module comprises an error comparison unit, a deviation analysis unit, a compensation path generation unit and a path execution unit; wherein:

[0038] Error comparison unit: used for receiving the actual contour data output by the three-dimensional scanning detection module, and performing spatial point cloud alignment with the ideal three-dimensional contour model in the preset hole type parameters to establish a one-to-one correspondence relationship therebetween;

[0039] Deviation analysis unit: based on the aligned point pairs, calculating the contour deviation value at each spatial position , and screening the local area exceeding the machining tolerance threshold;

[0040] Compensation path generation unit: used for contour surface fitting and local path planning on the area with deviation exceeding the machining tolerance threshold to generate a corresponding local compensation cutting trajectory;

[0041] Path execution unit: used for converting the local compensation cutting trajectory into linkage machining instructions, calling the main shaft in the multi-axis linkage precision machining module to perform compensation cutting action, and completing the finishing of the micro-hole contour and the interface transition zone.

[0042] Optionally, the compensation path generation unit comprises:

[0043] The isosurface extraction subunit is used for layering the spatial deviation values of the actual and ideal three-dimensional profile point cloud data in the region exceeding the tolerance threshold determined by the deviation analysis unit according to a set step length, extracting the isosurface profile lines corresponding to different deviation values, and obtaining the spatial distribution of the region needing compensation.

[0044] The path planning subunit generates a local compensation cutting trajectory along the isosurface level distribution according to the isosurface profile line and a set cutting depth and feeding strategy.

[0045] A three-component parallel composite fiber spinneret hole structure precision machining method is realized by the three-component parallel composite fiber spinneret hole structure precision machining system, and includes the following steps:

[0046] S1: Collecting a spinneret blank image, and identifying reference center coordinates of three groups of micro-hole machining positions;

[0047] S2: Generating collaborative machining path data of three groups of micro-holes and interface transition zones based on the reference center coordinates obtained in S1 and preset hole type parameters;

[0048] S3: According to the collaborative machining path data, driving a multi-spindle to perform synchronous three-dimensional motion, and machining initial micro-holes and interface transition zone profiles on the blank;

[0049] S4: After S3 is processed, actual three-dimensional profile data of the processed region is obtained by a structured light three-dimensional scanner;

[0050] S5: Comparing the actual three-dimensional profile data obtained in S4 with a preset ideal profile, and identifying deviation overrun regions;

[0051] S6: Fitting isosurfaces of the identified deviation overrun regions, and generating a local compensation cutting path;

[0052] S7: According to the local compensation cutting path, controlling the spindle to perform compensation cutting, completing finishing machining, and obtaining a spinneret finished product meeting design requirements.

[0053] The beneficial effects of the present application are:

[0054] The present application establishes a reference identification and unified positioning mechanism before machining, realizes overall coordinate control of three groups of micro-holes, combines collaborative path planning and multi-axis linkage machining steps, enables three groups of micro-holes and interface transition zones to be synchronously formed in the same coordinate system, and fundamentally eliminates position errors and interface discontinuity problems caused by independent machining of multiple holes.

[0055] The present application introduces three-dimensional scanning detection after initial machining is completed, generates a local compensation cutting path based on deviation comparison, and realizes closed-loop control of finishing compensation machining. BRIEF DESCRIPTION OF DRAWINGS

[0056] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of a precision machining system for spinneret hole structure according to an embodiment of the present invention;

[0058] Figure 2 This is a schematic diagram of the precision machining method for the spinneret hole structure according to an embodiment of the present invention. Detailed Implementation

[0059] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should also be noted that, to make the embodiments more comprehensive, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0060] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0061] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0062] like Figure 1 As shown, the precision machining system for the three-component parallel composite fiber spinneret hole structure includes a reference identification and positioning module, a collaborative path planning module, a multi-axis linkage precision machining module, a three-dimensional scanning and detection module, and a finishing and compensation machining module; wherein:

[0063] Reference identification and positioning module: used to acquire images of the spinneret blank, identify and output the preset reference center coordinates of the three micro-hole processing units;

[0064] Cooperative path planning module: for receiving a preset reference center coordinate, generating and outputting cooperative machining path data containing three micro-hole contours and interface transition zone contours according to the preset hole type parameters of the three-component parallel composite fiber;

[0065] Multi-axis linkage precision machining module: for receiving the cooperative machining path data and driving the machining spindle to perform three-dimensional motion to synchronously machine the primary hole type and the interface transition zone of the three micro-holes on the spinneret blank;

[0066] Three-dimensional scanning detection module: for real-time scanning to obtain actual three-dimensional contour data of the machined area after the primary hole type machining is completed;

[0067] Finishing compensation machining module: for receiving the actual three-dimensional contour data, comparing it with the ideal three-dimensional contour data in the preset hole type parameters, generating and executing finishing machining path to perform local compensation cutting on the micro-hole contour and the interface transition zone contour, and finally machining the spinneret finished product meeting the design requirements.

[0068] The reference recognition and positioning module includes an image acquisition unit, an edge extraction unit, a feature fitting unit, and a center coordinate output unit; wherein:

[0069] Image acquisition unit: for acquiring the spinneret blank surface image through the high-resolution industrial camera configured above the spinneret machining platform, the industrial camera is installed in a vertical overhead manner, and is combined with an axial light source for lighting to enhance the edge contrast, and a complete image frame containing all the to-be-machined areas is obtained;

[0070] Edge extraction unit: for performing gray scale enhancement and noise removal processing on the image obtained by the image acquisition unit, and performing edge detection operation by using Canny operator to extract the contour edge line of the micro-hole machining site on the spinneret blank surface;

[0071] The steps of performing edge detection operation by using Canny operator are as follows:

[0072] Calculate the gradient amplitude and direction: use Sobel operator to calculate the gradient of the image in the horizontal direction and the vertical direction , and then calculate the edge gradient amplitude and the gradient direction , the formulas are as follows: ; ;

[0073] Non-maximum suppression: based on the calculated gradient direction, traverse the gradient amplitude image at the pixel level, suppress the weak response value in the non-edge direction, and only keep the edge points at the local maximum value to thin the contour line;

[0074] Dual-threshold hysteresis connection: Set a high threshold With low threshold Double thresholding is applied to the image after non-maximum suppression, and the threshold value is higher than the maximum value. Strong edges are preserved directly; those below are not. Pixels that are considered noise are directly discarded; pixels that fall between these two categories are retained if they are connected to strong edges, otherwise they are discarded.

[0075] Output contour edge line map: Finally, the processing result is converted into a binary image, retaining the closed or semi-closed contour edge lines at all microhole processing locations.

[0076] Feature fitting unit: Based on the edge contour output by the edge extraction unit, it fits the standard circular contour of each group of micro-hole processing positions using the least squares method, and extracts the center coordinates of the circle as the initial reference coordinates. The calculation formula is as follows: ,in, , This represents the center coordinates of the fitted circle. , For the first The pixel coordinates of the edge points; This represents the total number of points on the contour edge.

[0077] Center coordinate output unit: Used to output the three sets of fitted initial reference coordinates as a preset reference center coordinate set according to the set processing order, and pass them to the collaborative path planning module for subsequent path calculation.

[0078] The collaborative path planning module includes a hole shape parameter reading unit, a contour construction unit, a path fusion unit, and a path output unit; wherein:

[0079] Hole Parameter Reading Unit: Used to receive preset hole parameters for each component, including hole diameter, aspect ratio, cone angle, and transition zone width;

[0080] Contour construction unit: Based on the preset reference center coordinates and combined with the preset hole shape parameters, it generates the standard contours of three micro-holes and the contour model of the interface transition zone between adjacent holes in three-dimensional space.

[0081] Path fusion unit: Performs path splicing and node reconstruction on the contour models of the three micropores and interface areas to generate a continuous and uninterrupted collaborative processing path;

[0082] Path output unit: Converts the fused path into G-code or interpolation format data and outputs it for use by the multi-axis linkage precision machining module; through the above unit, multi-hole integrated modeling and path synchronous planning can be realized, improving interface matching accuracy and composite fiber spinning quality.

[0083] The profile building unit comprises:

[0084] The micropore profile generating subunit is configured to generate three conical micropore profiles in three-dimensional space with a preset reference center coordinate as a center point, in combination with the aperture , the cone angle , the depth-width ratio and the length of the conical section , and the profile taper meets the following condition: , wherein, is the diameter of the aperture, is the diameter of the bottom of the aperture;

[0085] The interface transition zone modeling subunit is configured to calculate the minimum distance between the edges of adjacent micropore profiles according to the relative positions of the reference centers of the three micropores, and to build a curved surface profile with continuous curvature between the adjacent micropores based on the minimum distance axis and in combination with a set transition zone width, so as to form an interface transition zone model.

[0086] The multi-axis linkage precision machining module comprises a path analysis unit, a motion control unit and a spindle coordination driving unit, wherein:

[0087] The path analysis unit is configured to receive the collaborative machining path data output by the collaborative path planning module, and to analyze the three-dimensional coordinate point sequence of each group of micropore profiles and interface transition zones and the machining sequence information thereof;

[0088] The motion control unit is configured to convert the analyzed coordinate point sequence into interpolation motion instructions corresponding to the axial direction, to generate a corresponding multi-axis linkage control instruction set, and to include X, Y and Z three-axis position parameters and spindle speed instructions;

[0089] The spindle coordination driving unit is configured to drive the configured multi-spindle system according to the multi-axis linkage control instruction set, so that the three machining spindles simultaneously feed along the respective paths in the three-dimensional space, to complete the collaborative machining operation of the primary hole type of the three micropores and the interface transition zone.

[0090] The three-dimensional scanning detection module comprises a structured light projection unit, an image acquisition unit, a depth reconstruction unit and a profile data output unit, wherein:

[0091] The structured light projection unit is configured to project a structured light stripe with a coded pattern to the machined area, to form a light intensity modulation distribution, and to cover the entire area of the three micropores and the interface transition zone.

[0092] Image acquisition unit: for collecting a sequence of reflected images after the modulation of structured light from a fixed perspective by a high-resolution camera, extracting fringe shift information;

[0093] Depth reconstruction unit: for calculating the spatial depth value corresponding to each image pixel based on the principle of triangulation according to the fringe shift amount and the geometric parameters between the camera / projector, reconstructing a complete three-dimensional point cloud model;

[0094] Contour data output unit: for extracting the actual three-dimensional contour of the micro-hole boundary and transition zone from the three-dimensional point cloud model, and converting it into geometric data in a standard format for calling by the finishing compensation processing module; through the above three-dimensional scanning detection process, the real hole structure can be quickly and non-contactly obtained after the primary hole processing is completed, ensuring the accuracy and closed-loop control capability of the finishing processing.

[0095] The depth reconstruction unit comprises:

[0096] Fringe shift extraction subunit: for extracting phase change information from the sequence of reflected images obtained by the image acquisition unit, converting the fringe gray scale change into a continuous phase difference value graph according to the phase unwrapping algorithm, and obtaining the fringe shift amount of each pixel;

[0097] The fringe gray scale change reflects the modulation characteristics of the structured light by the object surface; in order to convert these gray scale changes into spatial depth information, the periodic fringe information in the gray scale graph needs to be converted into a continuous phase difference value graph, and this process is called phase unwrapping, the principle of which is as follows:

[0098] The projector projects a series of structured light fringes with periodic changes (such as sinusoidal waves, phase-shifted fringes, etc.) to the surface of the measured object; due to the ups and downs of the object surface, the projected fringes will be deformed and shifted in position at different positions, resulting in phase modulation of the gray scale values in the received images with the change of position;

[0099] By collecting multiple frames of fringe images with different phase shifts, each group of images is calculated at the pixel level, and the initial phase value of each pixel point (called wrapped phase) is calculated; the phase value only jumps within the interval [−π, π] or [0, 2π], and cannot reflect the real change of continuous space;

[0100] Since the actual object surface height change will cause phase accumulation, the wrapped phase must be unwrapped to restore it to a continuous phase distribution graph; common unwrapping methods include row-column scanning method, least squares method, quality guide method, etc., and the core idea is:

[0101] Detect the phase jump between adjacent pixels;

[0102] Determine whether the jump is a modulus jump of 2π;

[0103] If there is a jump, add or subtract 2π, so that the phase is continuous;

[0104] Each pixel value in the unwrapped continuous phase map can be regarded as the fringe phase offset of the point, and the phase offset value is proportional to the fringe offset of the object surface point under the structure light view angle.

[0105] View geometry modeling subunit: for constructing the corresponding triangulation model according to the installation geometry relationship between the projector and the camera, setting the baseline length, projection angle and imaging resolution parameters, for subsequent spatial position inverse calculation;

[0106] Spatial coordinate calculation subunit: for calculating the spatial depth value corresponding to each image pixel point according to the fringe offset, baseline length and projection angle , and reconstructing the three-dimensional point cloud coordinates combined with the pixel position , the calculation formula is as follows: ; ; , wherein, is the focal length of the camera, is the principal point coordinate, is the pixel position, is the baseline length, is the fringe offset.

[0107] The finishing compensation processing module includes an error comparison unit, a deviation analysis unit, a compensation path generation unit and a path execution unit; wherein:

[0108] Error comparison unit: for receiving the actual profile data output by the three-dimensional scanning detection module, and performing space point cloud alignment with the ideal three-dimensional profile model in the preset hole type parameter, establishing a one-to-one correspondence between the two;

[0109] Deviation analysis unit: based on the aligned point pairs, calculate the profile deviation value at each spatial position , and screen the local area exceeding the machining tolerance threshold, the specific calculation formula is: , wherein, is the coordinate of the th actual point, is the coordinate of the corresponding ideal point;

[0110] Compensation path generation unit: for isofacial fitting and local path planning on the area whose deviation exceeds the machining tolerance threshold, generating the corresponding local compensation cutting trajectory, and controlling the continuity of the path end to prevent interference;

[0111] Path execution unit: for converting local compensation cutting trajectory into linkage machining instruction, calling main shaft in multi-axis linkage precision machining module to execute compensation cutting action, completing the modification of micro-hole contour and interface transition area; through the above unit design, adaptive compensation machining based on detection data can be realized, the hole type precision and interface quality of the spinneret are improved, and the final machining result meets the design requirements.

[0112] The compensation path generation unit comprises:

[0113] The isosurface extraction sub-unit is configured to divide the spatial deviation values of the actual and ideal three-dimensional contour point cloud data in the region exceeding the tolerance threshold determined by the deviation analysis unit according to a set step length, extract isosurface contour lines corresponding to different deviation values, and obtain the spatial distribution of the region to be compensated.

[0114] The path planning sub-unit is configured to generate a local compensation cutting trajectory along the isosurface level distribution according to a set cutting depth and feeding strategy based on the isosurface contour line; through the above compensation path generation process, spatial fine layering and efficient path planning of the out-of-tolerance region are realized, which provides an executable machining trajectory basis for subsequent accurate modification and improves the size consistency and surface quality of the spinneret hole type and interface transition area.

[0115] As shown in Figure 2 A three-component parallel composite fiber spinneret hole structure precision machining method is realized by the three-component parallel composite fiber spinneret hole structure precision machining system, and comprises the following steps:

[0116] S1: Collecting the image of the spinneret blank and identifying the reference center coordinates of the three groups of micro-hole machining positions;

[0117] S2: Generating the cooperative machining path data of the three groups of micro-holes and the interface transition area based on the reference center coordinates obtained in S1 and the preset hole type parameters;

[0118] S3: According to the cooperative machining path data, driving the multi-spindle to execute synchronous three-dimensional motion to machine the initial micro-holes and the interface transition area contour on the blank;

[0119] S4: After S3 is completed, the actual three-dimensional contour data of the machined area is obtained by three-dimensional scanning of the structured light;

[0120] S5: Comparing the actual three-dimensional contour data obtained in S4 with the preset ideal contour to identify the deviation out-of-limit region;

[0121] S6: Fitting the isosurface of the identified deviation out-of-limit region to generate a local compensation cutting path;

[0122] S7: According to the local compensation cutting path, controlling the spindle to perform compensation cutting to complete the finishing machining and obtain the spinneret finished product meeting the design requirements.

[0123] The present application encompasses any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits, etc. are not described in detail.

[0124] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A three-component side-by-side composite fiber spinneret hole structure precision machining system, characterized by, It comprises a reference identification positioning module, a cooperative path planning module, a multi-axis linkage precision machining module, a three-dimensional scanning detection module, and a finishing compensation machining module. The reference identification positioning module is used for collecting images of the spinneret blank, identifying and outputting preset reference center coordinates of three micro-hole machining units. The reference identification positioning module comprises an image collection unit, an edge extraction unit, a feature fitting unit, and a center coordinate output unit. The image collection unit is used for collecting surface images of the spinneret blank by a high-resolution industrial camera arranged above a spinneret machining platform. The edge extraction unit is used for performing gray scale enhancement and noise removal processing on the images obtained by the image collection unit, and performing edge detection operation by using a Canny operator to extract the profile edge lines of the micro-hole machining positions on the surface of the spinneret blank. The feature fitting unit is used for fitting the standard circle profile of the edge of each group of micro-hole machining positions based on the least square method according to the edge profile output by the edge extraction unit, and extracting the center position coordinates as initial reference coordinates. The center coordinate output unit is used for outputting the initial reference coordinates obtained by fitting in three groups as a preset reference center coordinate set according to a set machining sequence. The cooperative path planning module is used for receiving the preset reference center coordinates, generating and outputting cooperative machining path data containing three micro-hole profiles and interface transition zone profiles according to the preset hole type parameters of the three component parallel composite fibers. The multi-axis linkage precision machining module is used for receiving the cooperative machining path data and driving the machining spindle to perform three-dimensional motion to synchronously machine the primary hole type and the interface transition zone of the three micro-holes on the spinneret blank. The three-dimensional scanning detection module is used for real-time scanning to obtain actual three-dimensional profile data of the machined area after the primary hole type machining is completed. The finishing compensation machining module is used for receiving the actual three-dimensional profile data, comparing it with the ideal three-dimensional profile data in the preset hole type parameters, generating and executing finishing machining path to perform local compensation cutting on the micro-hole profile and the interface transition zone profile, and finally machining the spinneret finished product meeting the design requirements. The cooperative path planning module comprises a hole type parameter reading unit, a profile construction unit, a path fusion unit, and a path output unit. The hole type parameter reading unit is used for receiving the preset hole type parameters of the hole diameter, depth-width ratio, taper angle, and transition zone width corresponding to each component. The profile construction unit generates the standard profile of the three micro-holes and the interface transition zone profile model between adjacent holes in the three-dimensional space based on the preset reference center coordinates and the preset hole type parameters. The path fusion unit performs path splicing and node reconstruction on the profile models of the three micro-holes and the interface region to generate a continuous and uninterrupted cooperative machining path. The path output unit converts the fused path into G code or interpolation format data. The profile construction unit comprises: Micropore profile generating subunit: for taking the preset reference center coordinate as the center point, combining the pore diameter corresponding to each component , the taper angle , the aspect ratio and the length of the taper section , three groups of frustum-shaped micropore profiles are generated in three-dimensional space, and the profile taper meets: , wherein, is the aperture diameter, is the hole bottom diameter; The interface transition zone modeling subunit is used for calculating the minimum distance between the edge profiles of adjacent micro-holes according to the relative positions of the reference centers of the three micro-holes, and constructing a curved surface profile with continuous curvature between adjacent micro-holes based on the minimum distance center axis and the set transition zone width. The finishing compensation processing module comprises an error comparison unit, a deviation analysis unit, a compensation path generation unit and a path execution unit; wherein: The error comparison unit is used for receiving the actual profile data output by the three-dimensional scanning detection module, and performing space point cloud alignment with the ideal three-dimensional profile model in the preset pass parameter, to establish a one-to-one correspondence between the two; deviation analysis unit: based on the aligned point pairs, calculate the profile deviation value at each spatial position and filter out local areas that exceed the machining tolerance threshold The compensation path generation unit is used for high surface fitting and local path planning on the area where the deviation exceeds the machining tolerance threshold, to generate the corresponding local compensation cutting trajectory; The path execution unit is used for converting the local compensation cutting trajectory into linkage machining instructions, calling the main shaft in the multi-axis linkage precision machining module to execute the compensation cutting action, and completing the finishing of the micro-hole profile and the interface transition area.

2. The three-component side-by-side composite fiber spinneret hole structure precision machining system according to claim 1, characterized by, The multi-axis linkage precision machining module comprises a path analysis unit, a motion control unit and a main shaft coordinated driving unit; wherein: The path analysis unit is used for receiving the collaborative machining path data output by the collaborative path planning module, and analyzing to obtain the three-dimensional space coordinate point sequence of each group of micro-hole profile and interface transition area and its machining sequence information; The motion control unit is used for converting the analyzed coordinate point sequence into corresponding axial interpolation motion instructions, to generate a corresponding multi-axis linkage control instruction set, including X, Y and Z three-axis position parameters and main shaft speed instructions; The main shaft coordinated driving unit is used for driving the configured multi-main shaft system according to the multi-axis linkage control instruction set, so that the three machining main shafts simultaneously feed along their respective paths in the three-dimensional space, to complete the collaborative machining operation of the three micro-holes and the interface transition area.

3. The three-component side-by-side composite fiber spinneret hole structure precision machining system according to claim 1, characterized by, The three-dimensional scanning detection module comprises a structured light projection unit, an image acquisition unit, a depth reconstruction unit and a profile data output unit; wherein: The structured light projection unit is used for projecting a structured light stripe with a coded pattern to the machined area, to form a light intensity modulation distribution, covering the entire area of the three micro-holes and the interface transition area; The image acquisition unit is used for acquiring a reflection image sequence after the structured light modulation from a fixed view angle by a high-resolution camera, to extract the stripe shift information; The depth reconstruction unit is used for calculating the space depth value corresponding to each image pixel based on the triangulation principle according to the stripe shift amount and the geometric parameters between the camera and the projector, to reconstruct a complete three-dimensional point cloud model; The profile data output unit is used for extracting the actual three-dimensional profile of the micro-hole boundary and the transition area from the three-dimensional point cloud model, and converting it into geometric data in a standard format.

4. The three-component side-by-side composite fiber spinneret hole structure precision machining system according to claim 3, characterized by, The depth reconstruction unit comprises: A stripe shift extraction subunit is used for extracting phase change information from the reflection image sequence obtained by the image acquisition unit, to obtain the stripe shift amount of each pixel; A view angle geometric modeling subunit is used for constructing a corresponding triangulation model according to the installation geometric relationship between the projector and the camera, to set the baseline length, projection angle and imaging resolution parameters; The spatial coordinate calculation subunit is configured to calculate a spatial depth value corresponding to each image pixel point according to the stripe offset, the baseline length, and the projection angle , and reconstruct a three-dimensional point cloud coordinate in combination with the pixel position .

5. The three-component side-by-side composite fiber spinneret hole structure precision machining system according to claim 1, characterized in that, The compensation path generation unit comprises: An isosurface extraction subunit is used for layering the space deviation values of the actual and ideal three-dimensional profile point cloud data in the area determined by the deviation analysis unit to be above the tolerance threshold according to a set step, to extract the isosurface contour line corresponding to different deviation values, and to obtain the spatial distribution of the area to be compensated; The path planning subunit: based on the contour line of the contour surface, according to the set cutting depth and feeding strategy, the local compensation cutting trajectory is generated along the contour surface level distribution.

6. The method for precision machining of the hole structure of a three-component side-by-side composite fiber spinneret according to any one of claims 1 to 5, which is implemented by the precision machining system for the hole structure of a three-component side-by-side composite fiber spinneret according to any one of claims 1 to 5, characterized in that, Comprising the following steps: S1: Collecting the spinneret blank image, identifying the reference center coordinates of the three groups of micro-hole processing sites; S2: Based on the reference center coordinates obtained in S1 and the preset hole type parameters, the cooperative processing path data of the three groups of micro-holes and the interface transition zone are generated; S3: According to the cooperative processing path data, drive the multi-spindle to execute synchronous three-dimensional motion, process the initial micro-hole and interface transition zone contour on the blank; S4: After S3 is processed, the actual three-dimensional contour data of the processed area is obtained by three-dimensional scanning of the structured light; S5: Compare the actual three-dimensional contour data obtained in S4 with the preset ideal contour, and identify the deviation overrun area; S6: Contour fitting is performed on the identified deviation overrun area to generate a local compensation cutting path; S7: According to the local compensation cutting path, control the spindle to carry out compensation cutting, complete the finishing processing, and obtain the spinneret finished product meeting the design requirements.

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