阅读说明：本技术 生成复合玻璃制品切割计划的方法和系统 (Method and system for generating a composite glass article cutting plan ) 是由 M·范兰德格姆 于 2020-07-08 设计创作，主要内容包括：本发明方法允许生成包括至少一个玻璃板(FV)和除玻璃板以外的至少一层(FI)的复合玻璃制品(VF)的切割计划。它包括：-获得所述至少一个玻璃板(FV)的缺陷的图(C-(FV))的步骤(E20)；-获得至少一个其他的缺陷的图(C-(FI),C-(DF))的步骤(E40),所述至少一个其他图的缺陷不是玻璃板的缺陷；针对其每个缺陷,每个所述图(C-(FV),C-(FI),C-(DF))包括所述缺陷的位置,所述缺陷的大小以及所述缺陷的临界水平；-至少使用所述图(C-(FV),C-(FI),C-(DF))并考虑到所述临界水平的使用规程(CDC)来生成所述复合玻璃制品(VF)的切割计划(PDD)的步骤(E110),所述切割计划(PDD)包括至少一条切割线,并且使得所述切割线均不穿过所述至少一个玻璃板(FV)的所述缺陷的排除区域,所述方法的特征在于,其允许所述切割线中的至少一条穿过所述其他图(C-(FI),C-(DF))的缺陷的排除区域。(The method of the invention allows to generate a cutting plan for a composite glass article (VF) comprising at least one glass sheet (FV) and at least one layer (FI) other than glass sheet. It includes: -obtaining a map (C) of defects of said at least one glass sheet (FV) FV ) Step (E20); -obtaining a map (C) of at least one other defect FI ,C DF ) Step (E40), the defect of said at least one other figure not being a defect of a glass sheetSinking; for each defect thereof, each of said maps (C) FV ,C FI ,C DF ) Including the location of the defect, the size of the defect, and the critical level of the defect; -using at least said map (C) FV ,C FI ,C DF ) And a step (E110) of generating a cutting Plan (PDD) of said composite glass article (VF) taking into account said critical level of use rules (CDC), said cutting Plan (PDD) comprising at least one cutting line and being such that none of said cutting lines crosses an exclusion zone of said defect of said at least one glass sheet (FV), said method being characterized in that it allows at least one of said cutting lines to cross said other map (C) FI ,C DF ) The defect exclusion area of (1).)

1. A method for generating a cutting plan for a composite glass article (VF) comprising at least one glass sheet (FV) and at least one layer (FI) other than glass sheets, the method comprising:

-obtaining a map (C) of defects of said at least one glass sheet (FV)_FV) Step (E20);

-obtaining a map (C) of at least one other defect_FI, C_DF) A step (E40) in which the defect of the at least one other figure is not a defect of the glass sheet;

for each defect thereof, each of said maps (C)_FV, C_FI, C_DF) Including the location of the defect, the size of the defect, and the critical level of the defect;

-using at least said map (C)_FV, C_FI, C_DF) And a step (E110) of generating a cutting Plan (PDD) of the composite glass article (VF) using a procedure (CDC) taking into account the critical level, the cutting Plan (PDD) comprising at least one cutting line and being such that the cutting lineAn exclusion area of the defects that do not pass through the at least one glass sheet (FV),

said method being characterized in that it allows at least one of said cutting lines to pass through said other graph (C)_FI, C_DF) The defect exclusion area of (1).

2. Method according to claim 1, characterized in that said at least one other graph (C)_FI, C_DF) The defects of (A) are that:

-a defect of said at least one layer; or

-defects occurring during the manufacturing process of the composite glass article.

3. Method according to claim 1 or 2, characterized in that a drawing (C) of the composite glass article is used_VF) Generating said cutting plan (E110) by combining said maps (C) of defects of said at least one glass sheet_FV) And the other figures (C)_FI, C_DF) And obtaining (E90), for each defect, the map (C)_VF) Including an attribute indicating whether the defect is a defect in the glass sheet, a defect in the at least one layer or a defect occurring during assembly.

4. The method according to claim 3, characterized in that it comprises a step (E100): the graph (C) of the composite glass article_VF) Stored in memory on a network.

5. The method according to any one of claims 1 to 4, wherein the at least one layer is a thin layer.

6. A method according to any of claims 1 to 4, characterized in that the composite glass article (VF) comprises at least two glass sheets (FV) and the at least one layer is an intermediate layer (CI) between the two glass layers, for example made of plastic such as polyvinyl butyral.

7. The method of claim 6, wherein the method comprises:

-a step (E60) of cutting the web to obtain said intermediate layer;

-using a map (C) of defects of said web_R) Obtaining said map of defects of said intermediate layer (C)_FI）（E40）。

8. The method of claim 7, wherein the method comprises:

-reading a unique Identifier (ID) of said web_R) Step (E30); and

-from said identifier (C)_FI) Downloading said map of defects of said coil in an indexed database (C)_FI) Step (E40).

9. The method according to any one of claims 1 to 8, characterized in that:

-reading a unique Identifier (ID) of said at least one glass sheet (FV)_FV) Step (E10); and

-from said Identifier (ID)_FV) Downloading said map of defects of said at least one glass sheet in an indexed database (C)_FV) Step (E20).

10. Method according to claims 7 to 9, characterized in that said web comprises positioning means (RC) able to allow the determination of the length of the intermediate layer unwound from said web and comprising:

-a step (E50) of reading the positioning means to unwind the web in order to cut the intermediate layer (FI) to a defined length;

-using a map (C) of defects of said web_R) And obtaining said map (C) of defects of said intermediate layer using said positioning means (RC)_FI）（E40）。

11. The method of claims 7 to 10, wherein the web includes indicia along a falling edge of the web, and comprising:

-a step of reading said mark;

-a step of calibrating the coordinate system of the map of defects of the at least one glass sheet and the map of defects of the at least one layer using the marks.

12. A System (SGPD) for generating a cutting plan for a composite glass article including at least one glass sheet and at least one layer other than a glass sheet, the system comprising:

-a module for obtaining a map of defects of the at least one glass sheet;

-a module for obtaining a map of at least one other defect, the defect of the at least one other map not being a defect of the glass sheet;

-for each defect of said maps, each map comprising a location of said defect, a size of said defect and a critical level of said defect;

-a module for generating a cutting plan for the composite glass article using at least the map and using a protocol that takes into account the critical level, the cutting plan comprising at least one cutting line and such that none of the cutting lines passes through an exclusion region of the defect of the at least one glass sheet,

the system is characterized in that the generation module allows at least one of the cut lines to pass through an exclusion area of a defect of the other graph.

13. A computer Program (PROG) comprising instructions for executing the steps of the method for generating a cutting plan according to any one of claims 1 to 11, when said program is executed by a computer (ORD).

14. A computer (ORD) -readable storage medium (12) having stored thereon a computer program comprising instructions for carrying out the steps of the method for generating a cutting plan according to any one of claims 1 to 11.

Background

The invention relates to the technical field of glass product cutting. In this document, any product comprising at least one glass sheet is referred to as "glass product".

More particularly, the present invention relates to a method of generating a glass article cutting plan that takes into account potential defects present on a glass sheet.

Document WO 2014/083371 of the applicant describes such a process. In summary, this method describes a method of generating a plan for cutting a glass sheet, wherein:

-detecting defects present in the glass ribbon prior to cutting the glass ribbon into sheets;

each glass sheet is identified by a unique identifier, for example in the form of a bar code;

-determining a severity criterion for each defect;

-generating a map of properties for each glass sheet, the properties of the glass sheet including location and severity criteria for the defects;

-the map of properties of the various glass sheets is stored in a database;

-allowing a user to find all or part of the attribute map for a given glass sheet;

-generating an optimized cutting plan for the glass sheet using at least some of the property maps of the glass sheet.

This method is very advantageous, but it does not optimize the cutting plan of composite glazing products, such as laminated glass.

In particular, in the current methods for cutting composite glass articles, the defects considered by the generation of the cutting plan will be considered after the assembly of the glass article, and there is no distinction between defects generated by the glass sheets and defects generated by the other constituent elements of the composite glass article. Therefore, all defects were treated in the same way as the glass sheets: no cutting line can pass through these defects nor its exclusion zone. Thereby causing unnecessary losses during cutting.

It should be remembered that the area of exclusion of a defect in a glass sheet is the area around the defect, so that if the cutting line passes through this area, the cutting will be unstable or result in the glass fragments in question.

By dealing with all defects in the same way, the cutting methods of the prior art implicitly define exclusion zones around the defects of the other constituent elements of the composite glass article, in particular in the case of laminated glass, around the defects of the intermediate plies.

For example, even assuming a defect map for each glass sheet used to make laminated glass and a defect map for an interlayer sheet made of polyvinyl butyral (PVB), the applicant has observed that the method for generating a cutting plan with a map of the defects of the laminated glass obtained by simply superimposing these maps as input produces a number of unnecessary losses.

The present invention relates to a method for creating an improved cutting plan for a composite glass article.

Disclosure of Invention

More specifically, the present invention relates to a method for producing a cutting plan for a composite glass article comprising at least one glass sheet and at least one layer other than a glass sheet, the method comprising:

-a step of obtaining a defect map of said at least one glass sheet;

-a step of obtaining a map of at least one other defect, which is not a defect of the glass sheet;

for each defect, each map includes a location of the defect, a size of the defect, and a critical level of the defect;

-a step of generating a cutting plan of the composite glass article using at least these figures and using a protocol that takes into account said critical level of the defect, the cutting plan comprising at least one cutting line and such that no cutting line passes through an exclusion zone of a defect of the glass sheet,

the method is characterized in that it allows at least one of said cutting lines to pass through the exclusion zone of the defect of the other figures.

In a related aspect, the present invention is directed to a system for generating a cutting plan for a composite glass article comprising: at least one glass sheet and at least one layer other than a glass sheet. The system comprises:

-a module for obtaining a defect map of the at least one glass sheet;

-a module for obtaining a map of at least one other defect, the defect of the at least one other map not being a defect of the glass sheet;

for each defect, each of these maps comprises the location of the defect, the size of the defect and the critical level of the defect;

-a module for said generating a cutting plan of the composite glass article using at least said map and using a protocol taking into account said critical level, the cutting plan comprising at least one cutting line and such that no cutting line passes through an exclusion zone of said at least one glass sheet defect,

the system is characterized in that the generation module allows at least one of the cut lines to pass through an exclusion area of a defect of the other graph.

Thus, and in general, the method and system for generating a cutting plan according to the present invention propose to relax certain cutting constraints by allowing the cutting line to pass through the exclusion area of defects other than the glass sheet.

The present invention therefore proposes to take into account that, in addition to defects of the glass sheet, certain defects may not be critical to the positioning of the cutting line. In a particular embodiment, the invention accepts that all defects identified on figures other than the sheet figure can be passed through by passing the cutting line, regardless of its critical level.

The layer other than the glass plate may be, for example, a coating formed of one or more thin layers. In particular, as is known, it is conventional to equip the glass sheets with one or more coatings which provide the glass sheets with specific characteristics, in particular specific optical characteristics (for example with respect to reflection or absorption of radiation in a given wavelength region), specific characteristics with respect to electrical conductivity, or even specific characteristics with respect to the ease of cleaning or the ability of the substrate to be self-cleaning. These coatings are usually stacks of thin layers based on inorganic compounds, in particular metals, oxides, nitrides or carbides. In the context of the present invention, a thin layer is understood to mean a layer whose thickness is less than one micron and generally varies between a few tens of nanometers to a few hundreds of nanometers (hence qualitatively "thin").

The method for generating a cutting plan according to the invention therefore allows the cutting line to pass through defects detected in such a thin layer.

In a particular embodiment, the composite glass article comprises at least two glass sheets, and the at least one layer is an interlayer between the two glass layers, for example made of plastic, polyvinyl butyral (PVB).

The method for generating a cutting plan according to the invention thus allows a cutting line to pass through defects detected in such an intermediate layer.

In a particular embodiment, the defects of the other figures are defects that occur during the manufacturing process of the composite glass article.

Thus, the method for generating a cutting plan according to the present invention allows the cutting line to pass through defects detected during assembly of the composite glass article.

In a particular embodiment, a cutting plan is generated using a map of the composite glass article obtained by combining said map of the defects of said at least one glass sheet with said other map.

In a particular embodiment, the method according to the invention comprises the following steps: the map of the composite glass article is stored in memory on a network, such as in a cloud.

In one embodiment, when the layer is an interlayer (made for example of plastic, such as of PVB), the process comprises a step of cutting the web to obtain the interlayer, and the defect map of the interlayer is obtained using the defect map of the web.

In one embodiment, the method comprises:

-a step of reading the unique identifier of the web; and

-a step of downloading a coil defect map from a database indexed by the identifier.

In one embodiment, the method comprises:

-a step of reading the unique identifier of the at least one glass sheet; and

-a step of downloading said map of defects of said at least one glass sheet from a database indexed by said identifier.

In one embodiment, the web includes a positioning device capable of determining the length of the intermediate layer unwound from the web, and the method includes:

-a step of reading the positioning means to unwind the web in order to cut the intermediate layer into a defined length;

a defect map of the intermediate layer is obtained using a defect map of the web and using a positioning device.

Such positioning means are known to those skilled in the art of speed measurement. They allow the length of the web and the speed of deployment or travel to be accurately determined. Optical velocimeters, such as laser surface velocimeters, are particularly known.

In one embodiment, these positioning means consist of a coding wheel.

In one embodiment, the web includes indicia along a falling edge of the web, and the method includes:

-a step of reading the mark;

-a step of calibrating the coordinate system of the defect map of the at least one glass sheet and the defect map of the intermediate layer using the mark.

In a particular embodiment, the various steps of the method for generating a cutting plan according to the invention are defined by computer program instructions.

The invention therefore also relates to a computer program on a data medium, the program containing instructions suitable for implementing the steps of the method for generating a cutting plan according to the invention.

The program may use any programming language and be in the form of source code, object code, or a code intermediate source and object code such as partially compiled form or in any other desired form.

The invention also relates to a storage medium readable by a computer and containing instructions of a computer program as described above.

The data medium may be any entity or system capable of storing the program. For example, the medium may include a storage device, such as a ROM, e.g., a CD-ROM or a ROM of a microelectronic circuit, or even a magnetic storage device, e.g., a hard disk.

Furthermore, the data medium may be a transmissible medium such as an electrical or optical signal, which may be routed via electrical or optical cable, by radio or by other means. The program according to the invention can be downloaded in particular via the internet.

Alternatively, the data medium may be an integrated circuit in which the program is incorporated, the circuit being adapted for performing, or for use in the performance of, the method in question.

Drawings

Further features and advantages of the invention will become apparent from the description given hereinafter, with reference to the accompanying drawings which illustrate exemplary embodiments of the invention, and which, without any limiting character, are described. In the figure:

FIG. 1 shows a composite glass article;

fig. 2A to 2D show diagrams that can be used in particular embodiments of the present invention;

FIG. 3 shows a roll of plastic PVB that can be used in one particular embodiment of the present invention;

FIG. 4 illustrates in flow chart form the main steps of a method for generating a cutting plan in accordance with a particular embodiment of the present invention; and

fig. 5 shows a system for generating a cutting plan according to the invention.

Detailed Description

Fig. 1 illustrates a composite glass article in the context of the present invention. In the example of FIG. 1, the composite glass article is a laminated glass VF comprising two glass sheets FV_i，FV_jAnd an intermediate layer FI made of plastic PVB.

Each glass sheet FV_iIncluding a unique identifier ID marked on the glass sheet_FVi。

FIG. 2A shows the identifier as ID_FVGraph C of defects of glass sheet_FVExamples of (2). For each defect of the glass sheet, the graph C_FVIncluding the position POS of the defect, the size TAILLE of the defect and the critical level NC of the defect in a coordinate system unique to the glass sheet.

In the exemplary embodiment described herein, these glass sheet defect maps are stored in a database BD indexed by identifiers of glass sheets_CFVIn (1).

Fig. 3 shows a roll R of plastic PVB. The web includes a unique identifier ID_RAnd an encoding wheel RC.

FIG. 2B shows an identifier ID_RGraph C of defects of coil_RExamples of (2). The graph C_RComprising for each defect of the web, the position POS of the defect in a coordinate system specific to the web, the size TAILLE of the defect and the critical level NC of said defect.

In the exemplary embodiment described herein, these coil defect maps are stored in a database BD indexed by the identifier of the coil_RIn (1).

Fig. 4 shows in the form of a flow chart the main steps of a method for generating a cutting plan for a composite glass article VF.

In this embodiment, the method is described with respect to generating a cutting plan optimized for the laminated glass VF of fig. 1.

In the embodiment described herein, the method comprises step E10: reading two glass plates FV_i，FV_jOf each glass sheet_FVi，ID_FVj(ii) a And a step E20 of retrieving the identifier from the database BD using it_CFVMap C of the defects of each of these glass sheets_FVi，C_FVj。

In the embodiment described here, the method according to the invention comprises reading the unique identifier ID of the roll R_RStep E30 and from the database BD_CRDownloading of a map C of defects of a web_RStep E40.

In the embodiment described here, the intermediate layer made of plastic PVB is cut (step E60) to be substantially equal to the glass sheet FV_i，FV_jWhich unrolls the roll R, which has the effect of driving the encoder wheel RC.

In the embodiment described herein, in step E70, a map C of the defects of the web is used_RAnd a graph C of the defects of the intermediate layer obtained from the information read by the coding wheel RC_FI(step E50).

The glass sheets and the interlayer are assembled to form the laminated glass VF in step E75.

At the end of this assembly step, the laminated glass is analyzed and, optionally, a map C of the defects occurring during the manufacturing process is created in step E80_DF。

For each defect that occurs during assembly, this diagram C_DFIncluding the position of the defect in a coordinate system specific to the laminated glass VF, the size of the defect and the critical level of said defect. An example of such a graph is given in fig. 2C. For each defect that occurs during assembly, this diagram C_DFIncluding the position POS of the defect, the size TAILLE of the defect and the critical level NC of said defect in a coordinate system unique to the glass sheet.

In the embodiments described herein, it is preferred that,the method according to the invention comprises a step E90 of E90 by combining a map C of the defects of each glass sheet_FVi，C_FVjFIG. C of defects in PVB interlayers_FIAnd defects occurring during assembly_RDrawing C for producing laminated glass VF_VF. This step requires, as is well known, an operation of calibrating the coordinate system associated with each graph.

In the embodiment described here, the method according to the invention comprises a step E100 of coupling, through a network, a diagram C of a composite glass article (here a laminated glass VF)_VFStore in database BF_VFIn the memory of (1). An example of such a graph is shown in fig. 2D. For each defect of the glass article, this graph C_VFIncluding the position POS of the defect, the size TAILLE of the defect and the critical level NC of said defect in a coordinate system specific to the glass article. It is worth noting that for each defect it also includes attributes ATT indicating whether the defect is a defect in the glass sheet, a defect in the PVB interlayer or a defect occurring during the assembly process.

In the embodiment described herein, the method according to the invention comprises a step E110, this step E110 using panel C of the composite glass article_VFAnd generates a cutting plan PDD for the composite glass article VF using the protocol CDC.

The protocol takes into account the critical level of each defect in order to cut the laminated glass sheet, thereby minimizing losses due to poor quality.

According to the invention, the cutting line of the cutting plan does not pass through the exclusion zone of the defects of the glass sheet. In the embodiments described herein, these exclusion zones are circles of 1cm radius around the defect.

The process according to the present invention is notable in that it allows the cutting of the planned at least one cutting line through the exclusion area of defects of the PVB interlayer or through the exclusion area of defects that occur during assembly.

Fig. 5 shows a system SGPD for generating a cutting plan according to the invention. The system comprises a computer ORD comprising a processor 10, a random access memory 11, a read-only memory 12 and a communication module COM for communication over a network NET.

The read only memory 12 is a medium according to the present invention. It stores a computer program PG according to the invention, the instructions of which, when executed by the processor 10, perform the steps of the method for generating a cutting plan described above with reference to fig. 4.

The computer is connected to a scanner SC configured to read the identifiers of the glass sheet and the web. It is also connected to a camera CAM for detecting any defects that occur during the manufacture of the composite glazing.

The communication module COM allows the computer to slave the database BD_VFVarious defect maps were downloaded (defect map of glass sheet) and BDR (defect map of web).

The communication module COM also allows the diagram C of the composite glazing to be combined_VFStored in a database BD_VFIn the memory of (1).