Positioning method for online laser film removal of coated glass

Abstract

The invention relates to the related technical field of coated glass, in particular to a positioning method for online coated glass laser film removal, which comprises the following steps: printing a feature block at a central position where a film needs to be removed, drying the black ink feature block on a dryer, putting glass printed with feature points into a laser film removal machine, and positioning the feature points by a visual camera. The center of a specific point and positioning in the X direction and the Y direction are determined, after positioning is determined, a Low-e film layer and black feature points on the surface of an original film are removed together through laser, after the film is removed through laser, the black feature points and the film layer are removed together, and conduction and transmission of electromagnetic signals are achieved; a 10 * 10 mm positioning point is printed on cut transparent online low-e coated glass in a silk-screen printing mode, laser film removal is carried out based on the position of the printed positioning point, laser positioning is guided through the position of a marking point, the requirement for the more accurate position degree of a film removal area is met, accurate positioning of the film removal area can be achieved, and the film removal efficiency is improved. And the position precision of the film removing area is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coated glass, in particular to a positioning method for laser film removal of online coated glass. BACKGROUND

[0002] Automotive glass is usually made of multiple layers of polymer material, with metal or ceramic filaments sandwiched in between. This type of glass is known as laminated glass or safety glass. The main feature of laminated glass is that when subjected to external impact, the glass will crack but will not break into sharp fragments, thereby protecting the occupants from flying glass. In addition, automotive glass can also include types such as tempered glass and regionally tempered glass. These glasses will break into small pieces when impacted to absorb energy and reduce impact force.

[0003] Online coated glass is colorless and transparent, and when used in automotive glass, it needs to be removed before printing black ink and pressing into shape in the oven. During production, laser is used to remove film from specific areas of online coated large plate glass, but in actual operation, there is no clear positioning point for laser film removal in specific areas of transparent colorless glass, and only the outer contour of the glass can be used for positioning and film removal, with poor positioning accuracy and a position deviation of more than ±5mm, making it difficult to meet the high-precision position requirements of customers. SUMMARY

[0004] The purpose of the present application is to provide a positioning method for laser film removal of online coated glass to solve the problems raised in the background art.

[0005] The technical solution adopted by the present application is as follows: A positioning method for laser film removal of online coated glass, comprising the following steps: S1: online coating of large-size flat plate glass, cutting and grinding according to the automotive glass contour program; achieving the shape and size of the flat state of the automotive glass; S2: printing a feature block at the center position where film removal is needed, as shown in Figure 1 ; S3: drying the black ink feature block on the drying machine; S4: placing the glass with printed feature points into the laser film removal machine, positioning the feature points with a vision camera, determining the center of the specific point and the X and Y direction positioning, matching the center points of film removal and the feature center points, and matching the X and Y direction positioning, as shown in Figure 2 ; S5: after positioning is determined, film removal is started, and the laser removes the Low-e film layer on the original plate together with the black feature points, as shown in Figure 3 ; S6: after laser film removal, the black feature points and the film layer are removed together, achieving the transmission of electromagnetic signals.

[0006] Optionally, other shape and size feature blocks in S2 can be used as long as the center point and X and Y direction positioning can be found. Optionally, the feature block is a 10*10mm black ink feature block.

[0007] Optionally, the drying temperature in S3 is 130-170 DEG C, and the drying time is more than 1 minute.

[0008] Compared with the prior art, the application has the following beneficial effects: The application prints a 10*10mm positioning point on the cut transparent online low-e coated glass by screen printing, and then performs laser film removal based on the position of the printed positioning point, so that the position of the film removal area is more accurate, and the precise positioning of the film removal area is realized. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0010] Figure 1 The figure shows the printing position of the marking point in the application; Figure 2 The figure shows the outline shape of the laser film removal area in the application; Figure 3 The figure shows the schematic diagram after laser film removal in the application. DETAILED DESCRIPTION

[0011] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0012] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the technical features indicated. Thus, features defined with "first", "second" or "third" can include one or more of such features, either explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly specified otherwise.

[0013] Embodiment one In view of the prior art, there is no clear positioning point for laser film removal in a specific area of transparent colorless glass. Only the outer contour of the glass can be used for positioning film removal, with poor positioning accuracy and a position deviation of ±3 mm or more, which is difficult to meet the high-precision position requirements of customers.

[0014] As shown in Figures 1-3 , the embodiment of the present application provides a positioning method for laser film removal of online coated glass, comprising the following steps: S1: online coating of large-size flat glass, cutting and grinding according to the automobile glass contour program; realizing the shape and size of the automobile glass in the flat state; S2: printing a feature block at the center position where film removal is needed, as shown in Figure 1 ; S3: drying the black ink feature block on the drying machine, with a drying temperature of 130°C and a drying time of 1 minute or more; S4: placing the glass with printed feature points into a laser film removal machine, positioning the feature points with a vision camera, determining the center of the specific point and the X and Y direction positioning, matching the center point of the film removal program with the center point of the feature, and matching the X and Y direction positioning, as shown in Figure 2 ; S5: after positioning is determined, film removal is started, and the Low-e film layer on the original sheet and the black feature point are removed together, as shown in Figure 3 ; S6: after laser film removal, the black feature point and the film layer are removed together, realizing the transmission of electromagnetic signals; the feature block in S2 can be any shape and size as long as the center point and the X and Y direction positioning can be found; the feature block is a 10*10mm black ink feature block.

[0015] Specifically, the position degree of the 10*10mm black printed positioning point can reach ±1mm, and the film removal positioning accuracy of the laser according to the positioning point can reach ±0.5mm. Therefore, the position accuracy of the final film removal area relative to the glass contour can be controlled within ±1.5.

[0016] Embodiment two As shown in Figures 1-3 , the embodiment of the present application provides a positioning method for laser film removal of online coated glass, comprising the following steps: S1: online coating of large-size flat glass, cutting and grinding according to the automobile glass contour program; realizing the shape and size of the automobile glass in the flat state; S2: printing a feature block at the center position where film removal is needed, as shown inFigure 1 S3: drying the black ink feature block on the dryer, drying temperature 150℃, drying time 1 minute or more; S4: placing the glass with the printed feature point into the laser film removing machine, positioning the feature point by the visual camera, determining the center of the specific point and the directional positioning of the X direction and Y direction, matching the center point of the film removing program with the center point of the feature, and matching the directional positioning of the X direction and Y direction, as shown in Figure 2 S5: after the positioning is determined, film removing is started, and the Low-e film layer on the original sheet and the black feature point are removed together, as shown in Figure 3 S6: after the laser film removing, the black feature point and the film layer are removed together, realizing the transmission of electromagnetic signals; other feature blocks of different shapes and sizes in S2 can be used as long as the center point and the directional positioning of the X direction and Y direction can be found; the feature block is a black ink feature block with a size of 10*10mm.

[0017] Example Three As shown in Figures 1-3 , the embodiment of the present application provides a positioning method for online coating glass laser film removing, including the following steps: S1: online coating large-size flat plate glass, cutting and grinding according to the automobile glass contour program; realizing the shape and size of the automobile glass in the flat state; S2: printing a feature block at the center position where film removing is needed, as shown in Figure 1 ; S3: drying the black ink feature block on the dryer, drying temperature 170℃, drying time 1 minute or more; S4: placing the glass with the printed feature point into the laser film removing machine, positioning the feature point by the visual camera, determining the center of the specific point and the directional positioning of the X direction and Y direction, matching the center point of the film removing program with the center point of the feature, and matching the directional positioning of the X direction and Y direction, as shown in Figure 2 ; S5: after the positioning is determined, film removing is started, and the Low-e film layer on the original sheet and the black feature point are removed together, as shown in Figure 3 ; S6: after the laser film removing, the black feature point and the film layer are removed together, realizing the transmission of electromagnetic signals; other feature blocks of different shapes and sizes in S2 can be used as long as the center point and the directional positioning of the X direction and Y direction can be found; the feature block is a black ink feature block with a size of 10*10mm.

[0018] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning method for online laser removal of coated glass, characterized in that, The process includes the following steps: S1: Online coating of large-size flat glass, followed by cutting and grinding according to the automotive glass contour program; achieving the shape and size of the flattened automotive glass; S2: Printing feature blocks at the center position where the coating needs to be removed, as shown in Figure 1; S3: Drying the black ink feature blocks in a dryer; S4: Placing the glass with printed feature points into a laser coating removal machine, using a vision camera to locate the feature points, determining the center of the specific point and the X and Y directions, aligning the center point of the coating removal program with the feature center point, and matching the X and Y directions, as shown in Figure 2; S5: After positioning, coating removal begins, with the laser removing the Low-e film layer and the black feature points from the original surface, as shown in Figure 3; S6: After laser coating removal, the black feature points and film layer are removed together, enabling the transmission of electromagnetic signals.

2. The positioning method for online laser removal of coated glass according to claim 1, characterized in that, In S2, any feature block of other shapes and sizes can be located as long as its center point and X and Y directions can be found.

3. The positioning method for online laser removal of coated glass according to claim 1, characterized in that, The feature block is a 10*10mm black ink feature block.

4. The positioning method for online laser removal of coated glass according to claim 1, characterized in that, The drying temperature in S3 is 130-170℃, and the drying time is more than 1 minute.

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