Target workpiece processing system and method

Abstract

This invention discloses a target workpiece processing system and method. The system includes: an identification generation unit configured to generate information identification marks for marking the front and back of the workpiece in a specific area inside the workpiece to be processed; a forming processing unit configured to perform reference positioning on the workpiece according to the reference positioning structure of the workpiece to be processed, and to process the workpiece to form the target workpiece; and an identification control unit configured to acquire the information identification marks inside the target workpiece conveyed to a predetermined identification station, identify the current positioning features, compare the current positioning features with preset front positioning features, determine the front and back of the target workpiece based on the comparison result, and control the target workpiece to perform predetermined processing based on the determination result. This invention can quickly and accurately identify the front and back of the workpiece and perform predetermined processing at predetermined process stages.

Description

Technical Field

[0001] This invention relates to the field of machining and manufacturing technology, and specifically to a target workpiece machining system and method. Background Technology

[0002] In industries such as precision manufacturing, consumer electronics, optical components, precision plastics, and metal stamping, it is often necessary to distinguish the front and back of a workpiece during certain processing steps to facilitate the required technological steps. However, some workpieces exhibit highly homogeneous front and back structures, with minimal differences in physical morphology, contour dimensions, curvature, and smooth boundary transitions between the two sides. Macroscopically, there are no obvious distinguishing features, making it difficult to quickly and accurately differentiate the front and back of a workpiece. For example, with 2.5D and 3D curved glass workpieces, after CNC (Computerized Numerical Control) grinding and polishing, the difference in curvature between the front and back is extremely small (the arc width is very narrow), making it difficult to quickly and accurately distinguish with the naked eye.

[0003] Due to the minute structural differences between the front and back of such workpieces, it is difficult to quickly and accurately distinguish between them. This severely impacts subsequent processing steps such as printing, bonding, finishing, and assembly, and easily leads to defects such as reverse processing and misaligned assembly. This not only results in large-scale scrapping of workpiece materials, increasing production consumables and manufacturing costs, but also causes production line downtime, interruptions in production cycles, and reduced production efficiency. Furthermore, the existing methods for distinguishing the front and back of workpieces are costly to operate manually, have poor recognition stability, and are difficult to adapt to automated continuous production conditions, thus hindering the intelligent and efficient upgrading of precision workpiece processing production lines. Summary of the Invention

[0004] This invention provides a target workpiece processing system and method to solve the problem in related technologies that it is difficult to quickly and accurately distinguish the front and back sides of a workpiece during the processing steps.

[0005] In a first aspect, the present invention provides a target workpiece machining system, the target workpiece machining system comprising: The identification generation unit is configured to generate information identification for identifying the front and back of the workpiece in a specific area inside the workpiece to be processed. The information identification has a positioning mark, the positioning mark has a reference reading orientation, and the reference reading orientation of the information identification satisfies a preset relative orientation relationship with the reference positioning structure of the workpiece to be processed. The forming and processing unit is configured to perform reference positioning on the workpiece to be processed according to the reference positioning structure of the workpiece to be processed, and to process the workpiece to be processed to form a target workpiece, wherein the workpiece surface corresponding to the positioning mark of the information identifier when it is in the reference reading orientation is the front of the target workpiece. The identification control unit is set at a predetermined identification station in each predetermined process. It is configured to acquire the current positioning features of the information identifier of a specific area inside the target workpiece that is transmitted to the predetermined identification station, identify the front and back of the target workpiece based on the comparison result of the current positioning features and the preset front positioning features, and control the target workpiece to perform predetermined process processing based on the identification results of the front and back.

[0006] In some embodiments, the identification control unit includes an information acquisition subunit and an information processing subunit; The information acquisition subunit is located above the predetermined identification station and is configured to scan the information identifier in a specific area inside the target workpiece that has been transported to the predetermined identification station, and acquire the positioning mark of the information identifier. The information processing subunit is configured to: receive the positioning mark output by the information acquisition subunit, acquire the current positioning feature of the information identifier, and identify the front and back of the target workpiece based on the comparison result between the current positioning feature and the preset front positioning feature.

[0007] In some embodiments, the information processing subunit is configured to: When the current positioning feature does not match the preset front positioning feature, it is determined that the target workpiece is currently in a reverse-facing state. When the current positioning feature matches the preset front positioning feature, an auxiliary verification feature is identified on the positioning mark, a first positional relationship between the auxiliary verification feature and the current positioning feature is determined, and a second positional relationship between the pre-stored auxiliary verification feature and the preset front positioning feature is extracted. The first positional relationship and the second positional relationship are compared. If the first positional relationship and the second positional relationship are inconsistent, it is determined that the target workpiece is currently in a reverse-facing state. If the first positional relationship and the second positional relationship are consistent, it is determined that the target workpiece is currently in a front-facing state.

[0008] In some embodiments, the frontal positioning feature includes the overall frontal layout of the positioning mark when the target workpiece is in a front-facing state, and the current positioning feature includes the actual overall layout of the currently identified positioning mark. The information processing subunit is configured to: When the actual overall layout of the positioning mark matches any of the frontal overall layouts of the positioning mark, it is determined that the target workpiece is currently in a front-facing state. When the actual overall layout of the positioning mark does not match any of the frontal overall layout features of the positioning mark, it is determined that the target workpiece is currently in a reverse-facing state.

[0009] In some embodiments, the information processing subunit is further configured to: after determining that the target workpiece is currently in a face-up state, calculate the relative rotation angle of the current positioning feature relative to the preset face-up positioning feature, and determine the unique processing posture of the target workpiece based on the relative rotation angle.

[0010] In some embodiments, the identification control unit further includes an execution subunit; The information processing subunit is further configured to: based on the front and back identification results of the target workpiece; when the target workpiece is currently in a front-facing state, issue a first control command to the execution subunit; when the target workpiece is currently in a back-facing state, issue a second control command to the execution subunit; and when the information identification fails, issue a third control command to the execution subunit. The execution subunit is configured to: control the target workpiece to continue processing according to a predetermined procedure according to the first control instruction; flip the target workpiece upside down or place the target workpiece into a first storage area according to the second control instruction; and place the target workpiece into a second storage area according to the third control instruction.

[0011] In some embodiments, the system further includes a first positioning mechanism; The first positioning mechanism is disposed at the predetermined identification station and is configured to position the target workpiece when the target workpiece is conveyed to the predetermined identification station, so that the target workpiece is fixedly located below the information acquisition subunit.

[0012] In some embodiments, the forming processing unit is provided with a second positioning mechanism that matches the reference positioning structure of the workpiece to be processed. The second positioning mechanism is configured to perform reference positioning on the workpiece to be processed according to the reference positioning structure of the workpiece to be processed.

[0013] Secondly, the present invention provides a method for machining a target workpiece, the method comprising: Pre-processing is performed on the workpiece to construct the reference positioning structure of the workpiece; Information markings for identifying the front and back of the workpiece are generated in a specific area inside the workpiece to be processed. The information markings are equipped with positioning marks and have a reference reading orientation. The reference reading orientation of the information markings and the reference positioning structure of the workpiece to be processed satisfy a preset relative orientation relationship. The workpiece is positioned according to the reference positioning structure of the workpiece to be processed, and the workpiece is processed to form the target workpiece. The workpiece surface corresponding to the positioning mark of the information identifier when it is in the reference reading orientation is the front of the target workpiece. During the predetermined process stage, information identification of a specific area inside the target workpiece that is transferred to the predetermined identification station is obtained and the current positioning features are identified. The current positioning feature is compared with the preset front positioning feature. Based on the comparison result, the front and back states of the target workpiece are determined, and the target workpiece is controlled to undergo predetermined processing based on the determination result.

[0014] In some embodiments, comparing the current positioning feature with a preset front positioning feature, determining the front and back states of the target workpiece based on the comparison result, and controlling the target workpiece to undergo predetermined processing based on the determination result includes: When the current positioning feature does not match the preset front positioning feature, it is determined that the target workpiece is currently in a reverse-facing state. When the current positioning feature matches a preset frontal positioning feature, an auxiliary verification feature is identified on the positioning mark, a first positional relationship between the auxiliary verification feature and the current positioning feature is determined, and a second positional relationship between the pre-stored auxiliary verification feature and the preset frontal positioning feature is extracted. By comparing the first positional relationship with the second positional relationship, if the first positional relationship is inconsistent with the second positional relationship, it is determined that the target workpiece is currently in a reverse-facing-up state. If the first positional relationship is consistent with the second positional relationship, then the target workpiece is determined to be currently in a face-up state.

[0015] According to the target workpiece processing system and method provided by the present invention, by embedding information tags used to identify the front and back of the workpiece inside the workpiece and associating and binding the front of the workpiece with the front positioning features of the information tags, the front and back of the workpiece can be quickly and accurately identified in subsequent predetermined processes through the front positioning features. Since the internal information tags are not affected by subsequent processing processes such as grinding, polishing, cleaning, and coating, there will be no problems such as detachment or wear. It can be adapted to continuous automated production lines without human intervention, reducing the rate of human error and improving identification efficiency and stability. In predetermined processes, the workpiece processing posture can be accurately controlled based on the identification results of the front and back of the workpiece, effectively preventing processing defects such as reverse printing, reverse bonding, and misaligned assembly, reducing the workpiece scrap rate, reducing material loss and production costs, improving production efficiency, ensuring production continuity, and enhancing the automation and intelligence level of the workpiece processing production line. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a block diagram illustrating the composition of a target workpiece processing system provided in an embodiment of the present invention. Figure 2 This is a top view schematic diagram of a workpiece to be processed according to an embodiment of the present invention; Figure 3 This is a side view of a workpiece to be processed according to an embodiment of the present invention; Figure 4 This is a schematic diagram of information identification scanning and recognition of the target workpiece in an embodiment of the present invention; Figure 5 This is a schematic diagram of the first positioning mechanism in an embodiment of the present invention; Figure 6 This is a schematic diagram of the forming process of the workpiece in an embodiment of the present invention; Figure 7 This is a schematic diagram of an information identifier according to an embodiment of the present invention; Figure 8 This is a schematic flowchart of a target workpiece processing method provided in an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It is understood that before using the technical solutions disclosed in the various embodiments of the present invention, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in the present invention and their authorization should be obtained in accordance with relevant laws and regulations through appropriate means.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In related technologies, for workpieces with only minor differences in their front and back structures, the common practice in the workpiece processing steps is to use manual visual differentiation, traditional machine vision inspection, external labeling, or inkjet coding to determine the front and back of the workpiece on the production line and to control errors.

[0022] The manual visual differentiation method relies on operator experience, which is inefficient and prone to visual fatigue during continuous operation, resulting in a high misjudgment rate (printing or laminating the reverse side as the front side), causing material scrap and production line shutdown.

[0023] Traditional machine vision discrimination methods attempt to identify subtle features such as surface curvature and edge chamfering, but due to the small differences in features, they are greatly affected by lighting and workpiece cleanliness, and the algorithms are complex and unreliable.

[0024] As for the differentiation method of external labeling or inkjet printing, labels are pasted on the surface of the workpiece or barcodes are sprayed on. However, labels are easy to fall off, inkjet printing is easy to wear off, and additional processes and costs are added. They cannot be retained in subsequent grinding and polishing processes.

[0025] It is evident that in related technologies, the slight differences in the structure of the front and back of a workpiece make it difficult to quickly and accurately distinguish between them. This severely impacts the normal operation of subsequent processing steps such as printing, bonding, precision machining, and assembly, and easily leads to process defects such as reverse processing and misaligned assembly. This not only results in large-scale scrapping of workpiece materials, increasing production consumables and manufacturing costs, but also causes production line downtime and interruptions in production cycle, reducing production efficiency. Furthermore, the manual methods for distinguishing the front and back of workpieces in these technologies are costly to implement and have poor recognition stability, making them unsuitable for automated continuous production and hindering the intelligent and efficient upgrading of precision workpiece processing production lines.

[0026] Therefore, embodiments of the present invention provide a target workpiece processing system and method, which aims to effectively solve at least one technical problem existing in the above-mentioned related technologies.

[0027] This invention provides a target workpiece machining system. As used below, the term "unit" can refer to a combination of software and / or hardware that performs a predetermined function. Although the system described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0028] Figure 1 This is a block diagram of a target workpiece machining system provided in an embodiment of the present invention, such as... Figure 1 As shown, the target workpiece machining system includes: The marking generation unit 101 is configured to generate information markings for marking the front and back of the workpiece in a specific area inside the workpiece to be processed. The information markings are provided with positioning marks, and the positioning marks have a reference reading orientation. The reference reading orientation of the information markings and the reference positioning structure of the workpiece to be processed satisfy a preset relative orientation relationship. The forming processing unit 102 is configured to perform reference positioning on the workpiece to be processed according to the reference positioning structure of the workpiece to be processed, and to process the workpiece to be processed to form the target workpiece. The workpiece surface corresponding to the positioning mark of the information identifier when it is in the reference reading orientation is the front of the target workpiece. The identification control unit 103 is set at a predetermined identification station in each predetermined process. It is configured to acquire information identifiers inside the target workpiece that is delivered to the predetermined identification station and identify the current positioning feature. It compares the current positioning feature with a preset front positioning feature, determines the front and back state of the target workpiece based on the comparison result of the current positioning feature and the preset front positioning feature, and controls the target workpiece to perform predetermined processing based on the determination result.

[0029] In this embodiment of the invention, the specific region inside the workpiece to be processed can be any designated location region inside the workpiece, for example, the location region near the bottom edge of the center of the workpiece along the length direction of the workpiece.

[0030] In this embodiment of the invention, based on the preset workpiece identification content such as workpiece category, batch, and traceability number, the data is compiled and generated into an original information identifier according to the corresponding code system encoding rules. Fixed-form positioning marks are placed within the information identifier, and the information identifier size, pixel arrangement, and light / dark block ratio are standardized. A standard information identifier template is created and stored to facilitate the generation of information identifiers within the workpiece. In specific applications, the information identifier can be a machine-readable graphic code or QR code with directional attributes, such as a Quick Response (QR) code or a Data Matrix code. The information identifier has at least one positioning mark, which can be a positioning graphic, a position detection graphic, or a positioning point. The positioning mark is a dedicated feature graphic placed within the information identifier, with a fixed position and shape, used to define the standard recognition posture and boundary orientation of the information identifier. It is responsible for providing the scanning device with a reference for position, direction, size, and rotation angle. The reference reading orientation is a standard recognition posture uniquely determined based on the fixed relative positional relationship between all positioning marks on the information identifier (such as the arrangement relationship between positioning marks). It is the standard default placement posture used by the scanning device when the information identifier is normally parsed and read.

[0031] In this embodiment of the invention, the workpiece to be processed is pre-treated to form a reference positioning feature. For example, the reference positioning feature is a solid process alignment structure formed on the edge or surface of the workpiece after pre-treatment. It is used for unified positioning and clamping during the internal engraving of information marking on the workpiece and subsequent forming processing, thereby fixing the relative orientation between the information marking reference reading direction and the workpiece surface. After the forming processing unit completes the forming processing of the workpiece, such as cutting and surface grinding, the reference positioning feature is removed along with the excess substrate. The final finished target workpiece no longer retains the reference positioning feature. For example, the reference positioning feature can be any one of the following: a positioning chamfer, a positioning notch of a specific shape, or an alignment drill hole.

[0032] In this embodiment of the invention, the preset relative orientation relationship between the reference reading orientation of the information identifier and the reference positioning structure of the workpiece to be processed means that when the information identifier is generated in a specific area inside the workpiece to be processed, the reference positioning structure on the workpiece is used as a unified clamping reference. The reference reading orientation determined by the positioning mark is adjusted and fixed to a posture corresponding to the reference positioning structure at a preset fixed angle, fixed direction or fixed position, so that the two form a unique and constant position orientation association in space. This relative orientation relationship is bound after the information identifier is generated and will not be offset or changed.

[0033] In this embodiment of the invention, the identification generation unit 101 generates information identification for identifying the front and back of the workpiece in a specific area inside the workpiece to be processed, based on a pre-set standard information identification template.

[0034] In this embodiment of the invention, the forming processing unit 102 completes the workpiece alignment and fixing based on the workpiece reference positioning structure. For example, the positioning chamfer of the workpiece is aligned with the specific clamping position of the machine tool fixture, the workpiece processing posture is corrected and fixed, and the workpiece is subjected to contour cutting, grinding and other forming processing to remove excess substrate and reference positioning structure, and finally the target workpiece that meets the workpiece forming specifications is obtained.

[0035] According to the target workpiece processing system of the present invention, by embedding information tags for identifying the front and back of the workpiece inside the workpiece and associating and binding the front of the workpiece with the front positioning features of the information tags, the front and back of the workpiece can be quickly and accurately identified in subsequent predetermined processes through the front positioning features. Since the internal information tags are not affected by subsequent processing processes such as grinding, polishing, cleaning, and coating, there will be no problems such as detachment or wear. It can be adapted to continuous automated production lines without human intervention, reducing the rate of human error and improving identification efficiency and stability. In predetermined processes, the workpiece processing posture can be accurately controlled based on the identification results of the front and back of the workpiece, effectively preventing processing defects such as reverse printing, reverse bonding, and misaligned assembly, reducing the workpiece scrap rate, reducing material loss and production costs, improving production efficiency, ensuring production continuity, and enhancing the automation and intelligence level of the workpiece processing production line.

[0036] In some embodiments, the system further includes a preset information unit configured to acquire and save the front positioning feature (i.e. the preset front positioning feature) of the positioning mark of the target workpiece when it is placed face up, based on the positioning mark of the built-in information identifier of the target workpiece. The front positioning feature serves as the basis for distinguishing the front and back of the target workpiece.

[0037] In some embodiments, the marking generation unit 101 includes a laser engraving device, such as an ultraviolet picosecond laser device. The marking generation unit 101 completes the workpiece alignment and fixation based on the workpiece reference positioning structure, and generates information markings for marking the front and back of the workpiece by engraving a specific area inside the workpiece through laser engraving.

[0038] In some embodiments, the identification generation unit 101 further includes a visual inspection device for positioning a reference positioning structure (such as a chamfer) of the workpiece to be processed. For example, an image sensor based on a charge-coupled device (CCD) is used. Before the information identification for marking the front and back of the workpiece is generated by engraving a specific area inside the workpiece using a laser engraving device, the reference positioning structure (such as a chamfer) of the workpiece to be processed is detected and positioned by the visual inspection device. This ensures that the reference reading orientation of the information identification and the reference positioning structure of the workpiece to be processed satisfy a preset relative orientation relationship during engraving. This defines the standard front reading orientation of the information identification and the front orientation of the workpiece to be processed. The reference positioning structure achieves a permanent and unique association between the standard front reading orientation of the information identification and the front orientation of the workpiece to be processed.

[0039] Figure 2 This is a top view schematic diagram of a workpiece to be processed according to an embodiment of the present invention. Figure 3 This is a side view schematic diagram of a workpiece to be processed according to an embodiment of the present invention. In some embodiments, such as... Figure 2 and Figure 3 As shown, the reference positioning structure of the workpiece to be processed is a positioning chamfer. The positioning chamfer is formed by chamfering at one corner of the workpiece. The required information mark is engraved in the center area of ​​the edge of the workpiece inside the workpiece, close to the positioning chamfer.

[0040] In some embodiments, the forming processing unit 102 includes a computer numerical control (CNC) machine tool, which aligns the reference positioning structure (such as chamfering) of the workpiece to be processed with a specific position of the machine tool positioning mechanism (such as a machine tool fixture), fixes the workpiece processing posture, and performs contour cutting, grinding and other processing on the workpiece to be processed, and finally forms the target workpiece. Since the processing reference is consistent with the reference of the internal engraving information mark, it ensures that the front and back of the processed target workpiece are strictly consistent with the front and back direction relationship of the internal information mark.

[0041] The reference positioning structure of the workpiece to be processed is the positioning chamfer. The positioning mechanism is matched with the positioning chamfer for positioning. The forming processing unit 102 performs contour cutting, grinding and other forming processing on the fixed workpiece to be processed to remove excess substrate and reference positioning structure, and finally obtains the target workpiece that meets the workpiece forming specifications.

[0042] In some embodiments, after the target workpiece is formed, when the target workpiece is in a face-up state, the preset information unit visually identifies the positioning marks of the internal information identifiers of the target workpiece, collects the frontal positioning features such as the overall frontal layout features of the positioning marks, the frontal rotation angle, the frontal positioning corners, and the positional relationships between each positioning corner, and saves the frontal positioning features in advance; or it receives and stores the frontal positioning features of the positioning marks input by the user; when the front and back of the workpiece need to be identified in subsequent predetermined processes, the pre-stored frontal positioning features are used as the comparison standard to determine whether the surface currently facing up of the workpiece is the front of the workpiece.

[0043] In some embodiments, a predetermined identification station is provided upstream of each predetermined process, and the identification control unit 103 is installed at the predetermined identification station of the predetermined process. The predetermined processes include, but are not limited to, screen printing, optical coating, and bonding processes.

[0044] In some embodiments, the identification control unit 103 includes an information acquisition subunit and an information processing subunit, and the information acquisition subunit and the information processing subunit are communicatively connected.

[0045] The information acquisition subunit is located above the predetermined identification station and is configured to scan the information identifiers in a specific area inside the target workpiece that has been transported to the predetermined identification station and acquire the positioning marks of the information identifiers. The information processing subunit is configured to: receive the positioning mark output by the information acquisition subunit, acquire the current positioning feature of the information identifier, and identify the front and back of the target workpiece based on the comparison result between the current positioning feature and the preset front positioning feature.

[0046] In some embodiments, the scanning field center of the information acquisition subunit is fixed relative to the transport channel of the target workpiece. The information acquisition subunit includes, but is not limited to, an industrial camera or a barcode scanner, and the information processing subunit may be a decoder, a controller, or a processor.

[0047] Figure 4 This is a schematic diagram of information identification scanning and recognition of the target workpiece in an embodiment of the present invention. In some embodiments, such as... Figure 4 As shown, in the predetermined process stage, the target workpiece to be carried out in the predetermined process is placed along its length direction in the conveyor channel (such as a conveyor belt) of the predetermined process for assembly line conveying. The length direction of the target workpiece is consistent with the conveying direction. When the target workpiece is sent to the predetermined identification station in the conveyor channel of the predetermined process, the information acquisition subunit above the position of the predetermined identification station in the conveyor channel scans the information identifier in a specific area inside the target workpiece sent to the predetermined identification station and obtains the positioning mark of the information identifier.

[0048] In some embodiments, a ring light source is also provided between the transmission channel and the information acquisition subunit. The ring light source is used to illuminate the target workpiece below when the information acquisition subunit scans the code, so as to facilitate code scanning and identification.

[0049] In some embodiments, the system further includes a first positioning mechanism; the first positioning mechanism is disposed at a predetermined identification station and configured to position the target workpiece when the target workpiece is conveyed to the predetermined identification station, so that the target workpiece is fixedly located below the information acquisition subunit.

[0050] Figure 5 This is a schematic diagram of the first positioning mechanism in an embodiment of the present invention. In some embodiments, such as... Figure 5 As shown, in the predetermined process stage, the target workpiece to be processed is placed along its length in the conveyor channel (such as a conveyor belt) of the predetermined process for assembly line transport. The length direction of the target workpiece is consistent with the conveying direction. When the target workpiece is transported to the predetermined identification station in the conveyor channel of the predetermined process, the first positioning mechanism positions and fixes the target workpiece below the information acquisition subunit, and makes a specific area of ​​the bottom edge of the target workpiece along its length correspond to the scanning field of view center of the information acquisition subunit. The information acquisition subunit scans the information mark in the specific area inside the target workpiece transported to the predetermined identification station and obtains the positioning mark of the information mark.

[0051] In some embodiments, the system further includes a support platform and a lifting device (not shown in the figures), such as Figure 5 As shown, the support platform carries the first positioning mechanism. When the target workpiece is sent to the predetermined identification station through the conveyor channel of the predetermined process, the first positioning mechanism is raised by the lifting device to fix and lift the target workpiece. After the information acquisition subunit finishes scanning, the first positioning mechanism is lowered by the lifting device to release the positioning of the target workpiece.

[0052] In some embodiments, the forming processing unit 102 is provided with a second positioning mechanism that matches the reference positioning structure of the workpiece to be processed. The second positioning mechanism is configured to perform reference positioning on the workpiece according to the reference positioning structure of the workpiece to be processed. For example, the forming processing unit 102 includes a computer numerical control (CNC) machine tool, the second positioning mechanism is a machine tool fixture, the reference positioning structure of the workpiece to be processed is a chamfer, and the machine tool fixture uses an angle-matching fixture that matches the chamfer of the workpiece to be processed for positioning. By designing a special angle-matching anti-foolproof fixture, the placement direction of the workpiece is guaranteed, and at the same time, the front of the processed workpiece is bound to the reference reading orientation of the information mark.

[0053] Figure 6 This is a schematic diagram of the forming process of the workpiece in an embodiment of the present invention. During application, as shown... Figure 6 As shown, the reference positioning structure of the workpiece to be processed is a positioning chamfer. The second positioning mechanism adopts a corner-aligning anti-fooling fixture that matches the positioning chamfer. The forming processing unit 102 positions and fixes the reference positioning structure of the workpiece to be processed through the corner-aligning anti-fooling fixture, and performs contour cutting, grinding and other forming processing on the fixed workpiece to be processed to remove excess substrate and reference positioning structure, and finally obtains the target workpiece that meets the workpiece forming specifications.

[0054] In some embodiments, multiple conveying channels may be provided in the predetermined process. Each conveying channel has an information acquisition subunit above the predetermined identification station. The multiple conveying channels can convey multiple target workpieces that need to undergo the predetermined process in parallel and perform information identification on the multiple target workpieces in parallel.

[0055] In some embodiments, the system further includes a loading and unloading device (not shown in the figure), which is configured to place the target workpiece along its length into the conveying channel of a predetermined process for conveying, and to remove the target workpiece after the predetermined process is completed.

[0056] In some embodiments, a blister pack can be used to load the target workpiece that needs to undergo a predetermined process. The target workpiece that needs to undergo the predetermined process can be taken out of the blister pack by a loading and unloading device and placed into the conveyor channel of the predetermined process for conveying. After the predetermined process is completed, the target workpiece can be removed and placed back into the blister pack.

[0057] In some embodiments, the loading and unloading device includes a material handling mechanism, such as a gripper, a suction cup, or a robotic arm.

[0058] In some embodiments, the information processing subunit is configured as follows: When the current positioning feature does not match the preset front positioning feature, it is determined that the target workpiece is currently in the reverse side facing up state; When the current positioning feature matches the preset front positioning feature, the auxiliary verification feature is identified on the positioning mark, the first positional relationship between the auxiliary verification feature and the current positioning feature is determined, and the second positional relationship between the pre-stored auxiliary verification feature and the preset front positioning feature is extracted. The first positional relationship and the second positional relationship are compared. If the first positional relationship and the second positional relationship are inconsistent, it is determined that the target workpiece is currently in the reverse face-up state. If the first positional relationship and the second positional relationship are consistent, it is determined that the target workpiece is currently in the front face-up state.

[0059] The positional relationship between the auxiliary verification feature and the localization feature can be the direction vector from the localization feature to the auxiliary verification feature.

[0060] In some embodiments, the preset frontal positioning features include, but are not limited to: positioning patterns (or positioning angles) and their relative positional relationships at at least two designated positions in the positioning marks observed from a top-down perspective when the target workpiece is placed face up. The designated positions are those specified in the information identifier under top-down viewing.

[0061] The currently identified positioning features may include, but are not limited to: positioning patterns (or positioning angles) and their relative positional relationships at at least two specified positions in the identified positioning marks observed from a top-down perspective when the target workpiece is in its current placement state.

[0062] The information processing subunit matches the positioning patterns and their relative positions of at least two designated positions in the positioning marks in the preset front state with the positioning patterns and their relative positions of the same two designated positions in the positioning marks observed and identified from a top-down perspective in the current placement state of the target workpiece. If the matching does not match, it indicates that the current placement state is a mirror image of the front state, and the information identifier has been mirrored or flipped, causing the positioning patterns and their relative positions of the designated positions to change relative to the front state. Therefore, it is determined that the target workpiece is currently in the reverse-facing state.

[0063] When the number of positioning patterns at a specified location is small, such as extracting only two positioning patterns and their relative positions, the information markers may be flipped or rotated, which may result in multiple positioning patterns and their relative positions remaining the same. Therefore, if the current positioning feature matches the preset front positioning feature, in order to further identify the front and back states of the target workpiece, auxiliary verification features can be introduced. The auxiliary verification features can be positioning patterns or positioning angles at other locations besides the at least two specified locations. By introducing auxiliary verification features, the overall distribution of positioning patterns of the positioning marks can be further clarified, thereby enabling more accurate positioning and orientation determination, and thus accurately identifying whether the positioning marks are mirrored.

[0064] If the current positioning feature matches the preset front positioning feature, an auxiliary verification feature is identified on the positioning mark, and the first positional relationship between the auxiliary verification feature and the current positioning feature is determined. The second positional relationship between the pre-stored auxiliary verification feature and the preset front positioning feature is extracted. By comparing the first positional relationship and the second positional relationship, if the first positional relationship and the second positional relationship are inconsistent, it is determined that the target workpiece is currently in the reverse-facing state. If the first positional relationship and the second positional relationship are consistent, it is determined that the target workpiece is currently in the front-facing state.

[0065] For example, the information identifier is a machine-readable graphic code or QR code. Its positioning markers include multiple positioning patterns or corners distributed at multiple corner positions of the QR code. The positioning patterns and their relative positions are collected from at least two designated positions of the positioning markers, observed from a frontal view with the target workpiece placed face up, as preset frontal positioning features. These features can include frontal positioning features observed from a reference reading orientation (rotation angle of 0°) or from a rotated state of the reference reading orientation (e.g., 90°, 180°, 270°, 360°). The designated positions can include at least two of the following positions from a top-down view: the upper left corner, lower left corner, upper right corner, and lower right corner of the graphic code or QR code.

[0066] Assuming the preset frontal positioning features include the positioning patterns at the lower left and upper right corners of the graphic code or QR code under a top-down view, and their relative positions; in a predetermined process stage, the information acquisition subunit scans the information identifiers in a specific area inside the target workpiece transmitted to the predetermined identification station from a top-down view, acquiring the positioning marks of the information identifiers; the information processing subunit extracts the positioning pattern currently located at the lower left corner, the positioning pattern currently located at the upper right corner, and their relative positions as the current positioning features, and compares the current positioning features with the preset frontal positioning features; if a match is not found... If they match, the target workpiece is determined to be in a reverse-facing position. If they match, the positioning pattern currently located in the upper left corner of the positioning mark is further extracted as an auxiliary verification feature. The first positional relationship between the auxiliary verification feature and the current positioning feature is determined, and the second positional relationship between the pre-stored auxiliary verification feature and the preset front-facing positioning feature is extracted. By comparing the first positional relationship and the second positional relationship, if the first positional relationship and the second positional relationship are inconsistent, the target workpiece is determined to be in a reverse-facing position. If the first positional relationship and the second positional relationship are consistent, the target workpiece is determined to be in a front-facing position.

[0067] In some embodiments, the frontal positioning feature includes the overall frontal layout of the positioning mark when the target workpiece is in a front-facing state, the current positioning feature includes the actual overall layout of the currently identified positioning mark, and the information processing subunit is configured to: When the actual overall layout of the positioning mark matches any of the frontal overall layouts of the positioning mark, it is determined that the target workpiece is currently in a face-up state. When the actual overall layout of the positioning mark does not match any of the frontal overall layouts of the positioning mark, it is determined that the target workpiece is currently in the reverse-facing state.

[0068] Among them, the overall layout state of the positioning marks refers to the inherent visual layout characteristics of the relative positions, spacing, orientation, combination arrangement, and corner position relationships of multiple positioning marks of the information mark. The overall layout state of the front can characterize the relative positions, spacing, orientation, combination arrangement, and corner position relationships of each positioning mark when the target workpiece is placed face up and the information mark is in the reference reading orientation or the reference reading orientation is rotated.

[0069] In some embodiments, the matching of the actual overall layout state with the front overall layout state can mean that the matching degree or similarity between the actual overall layout state and the front overall layout state is greater than or equal to a preset threshold; conversely, the mismatch between the actual overall layout state and the front overall layout state can mean that the matching degree or similarity between the actual overall layout state and the front overall layout state is lower than a preset threshold.

[0070] In some embodiments, the information identification image can be acquired in advance when the target workpiece is placed face up and the information identification is in the reference reading orientation or in a rotated state of the reference reading orientation. All positioning marks are identified and extracted, the position and orientation relationship of each positioning mark is determined, and the relative position arrangement rules between each positioning mark are integrated to determine the overall layout state of the front.

[0071] Taking the information identifier as a graphic code or QR code as an example, when placed face-up, the information identifier has four rotation angles and a corresponding overall layout state for each rotation angle. The rotation angle refers to the rotation angle relative to the reference reading direction. The overall layout state is the layout feature of the positioning mark observed from the reference reading direction at each rotation angle. Each rotation angle corresponds to one overall layout state for the front. The four rotation angles are 0° or 360°, 90°, 180° and 270°. When the rotation angle is 0° or 360°, the positioning mark of the information identifier is in the reference reading direction. The overall layout state of the positioning mark is different under different rotation angles. When mirrored and flipped to be placed face-down, the information identifier also has four rotation angles and a corresponding overall layout state for face-down at each rotation angle.

[0072] In some embodiments, the information processing subunit is further configured to: after determining that the target workpiece is currently in a face-up state, calculate the relative rotation angle of the current positioning feature relative to a preset face-up positioning feature, and determine the unique processing posture of the target workpiece based on the relative rotation angle.

[0073] The uniqueness of the processing posture of the target workpiece is determined by the relative rotation angle, which facilitates more precise processing. For example, in printing along a specific direction, the relative rotation angle can be used to identify whether the target workpiece is in a standard processing posture. For instance, the standard processing posture is defined as the relative rotation angle of the current positioning feature relative to the preset front positioning feature being 0°. If the relative rotation angle is not 0°, it is determined that the target workpiece is not in a standard processing posture, and the posture of the target workpiece can be corrected to bring it into a standard processing posture.

[0074] In some embodiments, the identification control unit further includes an execution subunit, which is communicatively connected to the information processing subunit.

[0075] The information processing subunit is also configured to: issue a first control command to the execution subunit when the target workpiece is currently facing up; issue a second control command to the execution subunit when the target workpiece is currently facing down; and issue a third control command to the execution subunit when the information identification fails. The execution subunit is configured to: control the target workpiece to continue processing according to a predetermined procedure according to a first control instruction; flip the target workpiece upside down or place the target workpiece into a first storage area according to a second control instruction; and place the target workpiece into a second storage area according to a third control instruction.

[0076] In some embodiments, the execution subunit may include one or more of the following: gripper, suction cup, robot arm, mechanical flipping device (such as a three-axis pneumatic suction cup flipping machine), and alarm device.

[0077] In some embodiments, the information acquisition subunit is further configured to read the workpiece information identifier stored in the information identifier. The workpiece information identifier includes, but is not limited to, one or more of the following: workpiece category, batch, traceability number, etc. The information processing subunit is further configured to associate and bind the front and back identification results with the workpiece information identifier and upload them to the MES (Manufacturing Execution System) to achieve full traceability of workpiece production.

[0078] Figure 7 This is a schematic diagram of an information identifier in an embodiment of the present invention, such as... Figure 7 As shown, the information identifier is a graphic code, such as a Data Matrix code. Its positioning marks include an L-shaped solid edge and alternating clock edges. The L-shaped solid edge can locate the origin and direction of the information identifier. By reading the number of modules on the alternating clock edges, the number of rows and columns and the rotation angle of the information identifier can be calculated.

[0079] In some applications, the workpiece to be processed can be a glass substrate, and the target workpiece can be curved (or arc-shaped) glass.

[0080] Based on the above-described target workpiece machining system, this embodiment of the invention also provides a target workpiece machining method. Figure 8 This is a schematic flowchart of a target workpiece processing method provided in an embodiment of the present invention, as shown below. Figure 8 As shown, the target workpiece machining method includes: Step 801: Pre-process the workpiece to be processed to construct the reference positioning structure of the workpiece. Provide a workpiece to be processed, such as a glass substrate, and pre-process the workpiece to be processed to construct a reference positioning structure for the workpiece, such as a positioning chamfer. Step 802: Generate information markings for identifying the front and back of the workpiece in a specific area inside the workpiece to be processed. The information markings are equipped with positioning marks and have a reference reading orientation. The reference reading orientation of the information markings and the reference positioning structure of the workpiece to be processed satisfy a preset relative orientation relationship. Step 803: Based on the reference positioning structure of the workpiece to be processed, the workpiece to be processed is positioned according to the reference positioning structure, and the workpiece to be processed is processed to form the target workpiece. The workpiece surface corresponding to the positioning mark of the information identifier when the reference reading orientation is the front of the target workpiece. Step 804: In the predetermined process stage, obtain the information identifier of a specific area inside the target workpiece that has been transferred to the predetermined identification station and identify the current positioning features; Step 805: Compare the current positioning feature with the preset front positioning feature, determine the front and back state of the target workpiece based on the comparison result, and control the target workpiece to perform predetermined processing based on the determination result.

[0081] In some embodiments, in step S805, the current positioning feature is compared with a preset front positioning feature, the front and back states of the target workpiece are determined based on the comparison result, and the target workpiece is controlled to undergo predetermined processing based on the determination result, including: When the current positioning feature does not match the preset front positioning feature, it is determined that the target workpiece is currently in the reverse side facing up state; When the current positioning feature matches the preset frontal positioning feature, the auxiliary verification feature is identified on the positioning mark, the first positional relationship between the auxiliary verification feature and the current positioning feature is determined, and the second positional relationship between the pre-stored auxiliary verification feature and the preset frontal positioning feature is extracted. Compare the first positional relationship with the second positional relationship. If the first positional relationship is inconsistent with the second positional relationship, it is determined that the target workpiece is currently in the reverse-facing-up state. If the first positional relationship is consistent with the second positional relationship, then the target workpiece is determined to be currently in a face-up state.

[0082] For a detailed description of the target workpiece machining method, please refer to the functional description of the relevant functional unit modules in the target workpiece machining system mentioned above, which will not be repeated here.

[0083] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A target workpiece machining system, characterized in that, The system includes: The identification generation unit is configured to generate information identification for identifying the front and back of the workpiece in a specific area inside the workpiece to be processed. The information identification has a positioning mark, the positioning mark includes a positioning feature, the positioning mark has a reference reading orientation, and the reference reading orientation of the information identification satisfies a preset relative orientation relationship with the reference positioning structure of the workpiece to be processed. The forming and processing unit is configured to perform reference positioning on the workpiece to be processed according to the reference positioning structure of the workpiece to be processed, and to process the workpiece to be processed to form a target workpiece, wherein the workpiece surface corresponding to the positioning mark of the information identifier when it is in the reference reading orientation is the front of the target workpiece. The identification control unit is set at a predetermined identification station in each predetermined process. It is configured to acquire information identifiers inside the target workpiece that is delivered to the predetermined identification station and identify the current positioning features. It compares the current positioning features with preset front positioning features, determines the front and back state of the target workpiece based on the comparison results, and controls the target workpiece to undergo predetermined processing based on the determination results.

2. The target workpiece machining system according to claim 1, characterized in that, The identification control unit includes an information acquisition subunit and an information processing subunit; The information acquisition subunit is located above the predetermined identification station and is configured to identify information identifiers in a specific area inside the target workpiece that has been transported to the predetermined identification station, and to acquire the positioning marks of the information identifiers. The information processing subunit is configured to: receive the positioning mark output by the information acquisition subunit, acquire the current positioning feature of the information identifier, and identify the front and back of the target workpiece based on the comparison result between the current positioning feature and the preset front positioning feature.

3. The target workpiece machining system according to claim 2, characterized in that, The information processing subunit is configured as follows: When the current positioning feature does not match the preset front positioning feature, it is determined that the target workpiece is currently in a reverse-facing state. When the current positioning feature matches the preset front positioning feature, an auxiliary verification feature is identified on the positioning mark, a first positional relationship between the auxiliary verification feature and the current positioning feature is determined, and a second positional relationship between the pre-stored auxiliary verification feature and the preset front positioning feature is extracted. The first positional relationship and the second positional relationship are compared. If the first positional relationship and the second positional relationship are inconsistent, it is determined that the target workpiece is currently in a reverse-facing state. If the first positional relationship and the second positional relationship are consistent, it is determined that the target workpiece is currently in a front-facing state.

4. The target workpiece machining system according to claim 2, characterized in that, The frontal positioning feature includes the overall frontal layout of the positioning mark when the target workpiece is in a front-facing state; the current positioning feature includes the actual overall layout of the currently identified positioning mark; and the information processing subunit is configured as follows: When the actual overall layout of the positioning mark matches any of the frontal overall layouts of the positioning mark, it is determined that the target workpiece is currently in a front-facing state. When the actual overall layout of the positioning mark does not match any of the frontal overall layouts of the positioning mark, it is determined that the target workpiece is currently in a reverse-facing state.

5. The target workpiece machining system according to claim 3 or 4, characterized in that, The information processing subunit is further configured to: after determining that the target workpiece is currently in a face-up state, calculate the relative rotation angle of the current positioning feature relative to the preset face-up positioning feature, and determine the unique processing posture of the target workpiece based on the relative rotation angle.

6. The target workpiece machining system according to claim 2, characterized in that, The identification control unit further includes an execution subunit; The information processing subunit is further configured to: based on the front and back identification results of the target workpiece, when the target workpiece is currently in a front-facing state, issue a first control command to the execution subunit; when the target workpiece is currently in a back-facing state, issue a second control command to the execution subunit; and when the information identification fails, issue a third control command to the execution subunit. The execution subunit is configured to: control the target workpiece to continue processing according to a predetermined processing procedure according to the first control instruction; and flip the target workpiece upside down or place the target workpiece into a first storage area according to the second control instruction. The target workpiece is placed in the second storage area according to the third control command.

7. The target workpiece machining system according to claim 2, characterized in that, The system also includes a first positioning mechanism; The first positioning mechanism is disposed at the predetermined identification station and is configured to position the target workpiece when the target workpiece is conveyed to the predetermined identification station, so that the target workpiece is fixedly located below the information acquisition subunit.

8. The target workpiece machining system according to claim 1, characterized in that, The forming processing unit is provided with a second positioning mechanism that matches the reference positioning structure of the workpiece to be processed. The second positioning mechanism is configured to perform reference positioning on the workpiece to be processed according to the reference positioning structure of the workpiece to be processed.

9. A method for machining a target workpiece, characterized in that, The method includes: Pre-processing is performed on the workpiece to construct the reference positioning structure of the workpiece; Information markings for identifying the front and back of the workpiece are generated in a specific area inside the workpiece to be processed. The information markings are equipped with positioning marks, which include positioning features and have a reference reading orientation. The reference reading orientation of the information markings and the reference positioning structure of the workpiece to be processed satisfy a preset relative orientation relationship. The workpiece is positioned according to the reference positioning structure of the workpiece to be processed, and the workpiece is processed to form the target workpiece. The workpiece surface corresponding to the positioning mark of the information identifier when it is in the reference reading orientation is the front of the target workpiece. During the predetermined process stage, information identification of a specific area inside the target workpiece that is transferred to the predetermined identification station is obtained and the current positioning features are identified. The current positioning feature is compared with the preset front positioning feature. Based on the comparison result, the front and back states of the target workpiece are determined, and the target workpiece is controlled to undergo predetermined processing based on the determination result.

10. The method for machining a target workpiece according to claim 9, characterized in that, The step of comparing the current positioning features with preset front positioning features, determining the front and back states of the target workpiece based on the comparison result, and controlling the target workpiece to undergo predetermined processing based on the determination result includes: When the current positioning feature does not match the preset front positioning feature, it is determined that the target workpiece is currently in a reverse-facing state. When the current positioning feature matches a preset frontal positioning feature, an auxiliary verification feature is identified on the positioning mark, a first positional relationship between the auxiliary verification feature and the current positioning feature is determined, and a second positional relationship between the pre-stored auxiliary verification feature and the preset frontal positioning feature is extracted. By comparing the first positional relationship with the second positional relationship, if the first positional relationship is inconsistent with the second positional relationship, it is determined that the target workpiece is currently in a reverse-facing-up state. If the first positional relationship is consistent with the second positional relationship, then the target workpiece is determined to be currently in a face-up state.

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