KR-102963977-B1 - Coating method and corresponding coating equipment

KR102963977B1KR 102963977 B1KR102963977 B1KR 102963977B1KR-102963977-B1

Abstract

The present invention relates to a coating method for coating a component (e.g., a vehicle body component) with a coating agent (e.g., paint), comprising the following steps: - Defines a pattern on the surface of the component to be coated, the pattern is a surface area revealed by the contour, and - Area coating of the component surface with a coating agent within the contour, - Sharp edge coating on component surfaces using a coating agent along at least a portion of the pattern's contour In addition, the present invention includes a coating facility that operates accordingly.

Inventors

프리츠, 한스-게오르크
뵈르, 벤자민
라발레, 제롬
부벡, 모리츠
베일, 티모
탠들러, 다니엘
베른트, 토비아스
히어, 프랭크
소츠니, 슈테펜

Assignees

듀르 시스템스 아게, 슈트트가르트

Dates

Publication Date: 20260512
Application Date: 20200504
Priority Date: 20190509

Claims (20)

In a coating method for coating a component with a coating agent, Steps below: a) a step of defining a pattern (3) on the surface of a component to be coated, wherein the pattern (3) is a surface area bounded by contours (2; 5, 6), and b) includes the step of area-coating the surface of a component with a coating agent within the contour (2; 5, 6), and c) characterized by the step of applying a sharp edge coating to the surface of a component along at least a portion of the contour (2; 5, 6) of the pattern (3), and d) Coating is performed by an applicator (13) having a plurality of nozzles that can be activated or deactivated individually or in groups for coating, and e) A coating method characterized by activating a larger number of nozzles for coating the area within contour (2; 5, 6) than in the case of sharp edge coating along contour (2; 5, 6).
In paragraph 1, A coating method characterized in that the area coating within the contour (2; 5, 6) is performed with a larger area coating performance than the sharp edge coating along the contour (2; 5, 6).
In paragraph 1, A coating method characterized by less than 20, 10, 5 or only a single nozzle of the applicator (13) being activated for coating sharp edges along contours (2; 5, 6).
In any one of paragraphs 1 through 3, a) A sharp edge coating is performed by an applicator (13) that moves along the contour (2; 5, 6) of the pattern (3) by a manipulator (12), and b) The applicator (13) applies the coating agent at a specific flow rate during sharp edge coating along the contour (2; 5, 6), and c) The manipulator (12) moves the applicator (13) along the contour (2; 5, 6) at a specific speed over the component surface during sharp edge coating, and d) During sharp edge coating along contour (2; 5, 6) (2; 5, 6) d1) The flow rate of the coating agent is adjusted as a function of the transverse velocity to achieve a coating thickness on the component surface that is as constant as possible. d2) A coating method characterized by maintaining a constant flow rate of the coating agent.
In any one of paragraphs 1 through 3, a) A sharp edge coating along the contour (2; 5, 6) of the pattern (3) is performed by a manipulator (12), and b) The manipulator (12) moves the applicator (13) along the contour (2; 5, 6) at a specific transverse speed over the component surface during sharp edge coating, thereby traversing the contour (2; 5, 6), and c) The manipulator (12) does not traverse the contour (2; 5, 6) adjacently, but traverses multiple path sections (BA1-BA4), and d) A coating method characterized by the applicator (13) stopping the delivery of the coating agent between the coatings of the immediately consecutive path sections (BA1-BA4) of the contour (2; 5, 6).
In paragraph 5, a) Directly consecutive path sections (BA1-BA4) are adjacent to each other at problem points (7-10) of contour (2; 5, 6), such that the manipulator (12) can pass through problem points (7-10) without interruption only when there is a drop exceeding 50%, 70%, 80% or 90% of the traverse speed, or b) A coating method characterized by the manipulator (12) performing a non-twisted starting movement at a problem point (7-10) between the coatings of the immediate continuous path sections (BA1-BA4) to restart in the immediate continuous path section.
In paragraph 1, a) A sharp edge coating of the contour (2; 5, 6) is performed with an adjacent coating agent jet along the longitudinal direction of the jet, or b) A coating method characterized by first performing coating on the sharp edges of the contour (2; 5, 6) with adjacent coating agent jets along the length of the jet, and then performing droplet spraying consisting of non-adjacent droplets along the length of the jet.
In paragraph 1, Area coating of the pattern (3) and sharp edge coating of the contour (2; 5, 6) are performed alternately with a coating agent jet adjacent to the longitudinal direction of the jet and droplet spraying consisting of droplets not adjacent to the longitudinal direction of the jet, actually a) Take turns at the time or b) A coating method characterized by alternating between a pattern (3) and a contour (2; 5, 6).
In paragraph 1, a) a step of first coating the pattern (3) and then coating the contour (2; 5, 6), or b) A coating method characterized by the step of first coating the contour (2; 5, 6) and then coating the pattern (3).
In paragraph 1, a) a step of first coating the pattern (3) and then coating the contour (2; 5, 6), and b) A coating method characterized by the step of detecting the pattern (3) applied to the surface of a component in relation to its spatial position and scale by a measurement system (11) in order to determine the contour (2; 5, 6) after area coating of the pattern (3).
In paragraph 1, a) a step of first coating the contour (2; 5, 6) and then coating the pattern (3), and b) A coating method characterized by the step of detecting a contour (2; 5, 6) applied to the surface of a component by a measuring system (11) to determine the area scale of the pattern (3).
In Article 10 or Article 11, a) The measurement system (11) is attached to the manipulator (12) and moves together with the manipulator (12), b) A coating method characterized in that the measuring system (11) is positioned separately from the manipulator (12) in a fixed manner.
A coating method according to claim 1, characterized by at least one of the following: a) Area coating within contour (2; 5, 6) is performed with a coating material different from the sharp edge coating along contour (2; 5, 6), b) Area coating of different patterns (3) is performed using different coating means, c) The sharp edge coating of different contours (2; 5, 6) is performed using different coating means.
In paragraph 1, a) After the coating agent is applied to the surface of a component, it may operate only within a specific execution time to form an adjacent coating on the surface of the component, and b) A coating method characterized in that the area coating of the pattern (3) and the sharp edge coating along the adjacent contours (2; 5, 6) are performed at time intervals shorter than the flow time of the applied coating agent, so that the coating agent of the surface and the contours (2; 5, 6) can be mixed together.
In paragraph 1, a) Area coating within contour (2; 5, 6) is performed along contour (2; 5, 6) with a sharp edge coating and other coating materials, and b) The coating agent may operate only within a specific flow time to form an adjacent coating over the entire area of the component surface after being applied to the component surface, and c) A coating method characterized in that the area coating of the pattern (3) and the sharp edge coating along the adjacent contours (2; 5, 6) are performed at a time interval longer than the flow time of the applied coating agent, so that the coating agents of different surfaces and contours (2; 5, 6) cannot be mixed together.
In paragraph 1, a) The coating agent is applied by an applicator (13) that emits a narrowly limited coating agent jet without emitting a spray jet, and b) The coating agent jet is b1) Consists of coating agent droplets separated from each other along the length of the jet or b2) Adjacent along the length of the jet, c) The applicator (13) is moved over the surface of the component by the manipulator (12), and d) The manipulator (12) has spatial positioning accuracy and/or repeatability accuracy that is more accurate than 5 mm, 2 mm, or 0.5 mm, e) The coating agent is a paint, water-based paint or solvent-based paint, or an adhesive, adhesion promoter, primer, pasteurizing material, sealant, insulating material, and f) A coating method characterized in that the coating agent is applied at a specific application distance between the applicator (13) and the surface of the component, and the application distance is 1 mm-80 mm or 5 mm-50 mm.
In paragraph 1, a) A step of determining the type of manipulator to guide the applicator, b) a step of reading a manipulator-specific parameter set from memory, wherein the manipulator-specific parameter set represents the attributes of the manipulator, and c) Step of defining the type of applicator, d) a step of reading an applicator-specific parameter set from memory, wherein the applicator-specific parameter set represents the attributes of the applicator, and e) A step for defining a path program-specific parameter set, and the path program-specific parameter set represents the attributes of the robot path, e1) Coating path width, e2) Radius of the curve of the robot path, e3) Coating volumetric flow, e4) Maximum path speed, f) Step to read pattern from memory, g) Analysis step of the read pattern to determine the contour, h) This is the calculation step of the path program, and next, the calculation, h1) Access path, h2) Starting route, h3) Switch-on point or h4) Switch-off point, i) A coating method characterized by at least one of the visualization steps of a path program.
As a coating facility for coating components with a coating agent, a) an applicator (13) for applying a coating agent, b) a manipulator (12) for moving an applicator (13) over a component surface in the form of a multi-axis coating robot (12) having serial robot kinematics, and c) including a control system (14) for controlling the manipulator (12) and the applicator (13), and d) A coating facility characterized by a control system (14) executing a coating method according to claim 1.
In Paragraph 18, A coating facility characterized by a measurement system (11) for detecting the spatial location and scale of a pattern (3) or contour (2; 5, 6), wherein the measurement system (11) is signal-connected to a control system (14).
A computer-readable medium storing a computer program that causes the application system to execute the coating method according to claim 1 when executed on the control system of the application system.

Description

Coating method and corresponding coating equipment The present invention relates to a coating method for coating a component (e.g., a vehicle body component) with a coating agent (e.g., paint). The present invention also relates to a corresponding coating plant. In modern coating plants for painting automotive body components, rotary sprayers are typically used as application devices that deliver a spatially expanded spray jet of paint to be applied. On the other hand, more recent development lines provide nozzle applicators as dispensing devices, also known as print heads, as described, for example, in DE 10 2013 002 412 A1. In contrast to known rotary atomizers, these nozzle applicators do not emit a spatially expanded spray jet of coating, but rather spray a spatially narrowly confined jet of coating agent. This has the advantage that the applied coating is deposited almost completely onto the component to be coated, resulting in little to no overspray. Another advantage of these known nozzle applicators is that patterns can be applied to component surfaces such as graphics or text. However, the issue here is that the contours of the pattern are not sharp-edged. FIG. 1a is a schematic diagram of a conventional coating pattern having a nozzle applicator, wherein adjacent coating agent jets in the longitudinal direction of the jet, FIG. 1b is a pattern according to FIG. 1a after the coating agent path converges on the component surface, FIG. 2a is a variation of FIG. 1a for a nozzle applicator emitting droplet jets. FIG. 2b is a variation of FIG. 1b for a nozzle applicator emitting droplets. FIGS. 3a-3d are various schematic diagrams having a pattern application according to the present invention having a nozzle applicator that emits adjacent coating agent jets in the longitudinal direction of the jet, FIGS. 4a-4d is a variation of FIGS. 3a-3d for a nozzle applicator emitting droplets, FIG. 5 is a flowchart illustrating a coating method according to the present invention, and FIG. 6 is a highly simplified schematic diagram of a coating facility according to the present invention. It has already been described above that due to the cohesiveness of the coating agent, coating agent droplets or the coating agent applied to the component converge into an adjacent coating agent film after application, which is desirable in principle. However, such convergence is possible only within a certain flow time after the application of the coating agent. When the same coating agent is used for contour and area coating, it is fundamentally desirable to perform the contour and internal surface together. In this case, preferably, the area coating of the pattern and the sharp edge coating along the contour are performed at time intervals shorter than the flow time so that the coating agent can be performed on the contour and the surface together. In the case of different coating agents for the contour and interior surfaces, particularly when different colors are used for the contour and interior surfaces, such convergence of the coating agents is not exactly desirable. In this case, the area coating of the pattern and the sharp edge coating along the contour are performed at time intervals greater than the flow time, so that the different coating agents for the contour and interior surfaces are not applied together. Generally, it should be noted that it is preferable for the coating agent to be applied by an applicator that emits a narrowly limited jet of the coating agent rather than a spray jet. Therefore, the applicator may, in principle, be a printhead, as is known in the prior art. For example, a coating agent jet may consist of coating agent droplets separated from each other along the longitudinal direction of the jet. However, alternatively, it is also possible for the coating agent jets to be adjacent along the longitudinal direction of the jet. It has been briefly described that it is desirable for the applicator to move over the component surface by a manipulator, preferably a multi-axis coating robot with serial robot kinematics or a linear axis system. It would be advantageous here if the manipulator had high spatial positioning accuracy and/or repeatability, preferably more accurate than 5 mm, 2 mm, or even 0.5 mm. This is useful for enabling the contours and internal surfaces of the pattern to be applied to each other with precision. Regarding the type of coating agent applied, the present invention is not limited to paints such as one-component paint, two-component paint, water-based paint, or solvent-based paint. Rather, the coating agent may be an adhesive, a binder, a primer, a paste material, a sealant, or an insulating material. In addition, it should be noted that it is desirable to apply the coating agent with a specific application distance between the applicator and the component surface, and the application distance is preferably in the range of 1 mm to 80 mm, 5 mm to 50 mm, or 10 mm to 50 mm. Furth