Automatic coating device and coating method for protecting silicone rubber

Abstract

The invention provides an automatic coating device and method for protecting silicone rubber, and relates to the technical field of protective silicone rubber coating, and the device comprises an operation table, a movement mechanism, a gumming machine, an ion blower gun, a measurement system, a feeding machine and a control system. The device is provided with a movement mechanism, so that the gluing track movement with large size and complex appearance can be realized; a measuring system is arranged, so that a gluing path can be accurately planned according to surface materials of various workpieces to be glued, a specific workpiece is corrected, and the gluing track of a movement mechanism is corrected in real time; a brush coating glue injection machine and a needle type glue injection valve are combined with a sliding table air cylinder, so that one mechanical arm drives a plurality of glue injection heads to finish coating of low-fluidity silicon rubber and high-fluidity base coat, and interference between the device and a workpiece is avoided; and meanwhile, a color laser coaxial displacement meter is combined with a CMOS (Complementary Metal-Oxide-Semiconductor Transistor) laser displacement sensor, so that the accurate detection of the coating thickness of the surface protection silicone rubber (including the prime coat) of various materials is realized.

Description

Technical Field

[0001] The invention relates to the technical field of protective silicone rubber coating, and in particular provides an automatic coating device and a coating method for protective silicone rubber. Background Art

[0002] Protective silicone rubber is used to coat the surface of precision parts to play the role of sealing, anti-loosening, and anti-corrosion. It has high requirements for coating firmness, position accuracy, thickness accuracy, and appearance consistency.

[0003] For workpieces produced in batches, the shape errors of the workpieces caused by processing and assembly errors must be corrected by gluing trajectory before gluing. It is particularly difficult to detect the height of workpieces with complex shapes and changeable materials (especially transparent materials, mirrors, and multiple reflective surfaces). The laser altimeters or 3D vision commonly used in the industry have great limitations. The height of the glue injection head of the silicone rubber with low fluidity relative to the workpiece surface, and the coating thickness of the primer with high fluidity will directly affect the bonding strength of the silicone rubber. The motion error of the motion mechanism will greatly reduce the detection accuracy of the glue thickness of spatial special-shaped workpieces, affecting the judgment of the detection results of the primer and protective silicone rubber coating thickness.

[0004] Therefore, it is necessary to invent an automated gluing technology that can automatically measure and correct gluing trajectory errors, accurately coat protective silicone rubber (including primer), and accurately detect primer and protective silicone rubber coating thickness for workpieces with complex shapes and variable materials. Summary of the invention

[0005] The purpose of the present application is to provide an automated protective silicone rubber coating device for workpieces of large size, complex shape, and variable material, so as to complete high-quality coating of the protective silicone rubber.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An automatic coating device for protecting silicone rubber, the device comprising:

[0008] The operating table is used as a supporting platform for the equipment to provide working space;

[0009] Glue coating machine, used for coating the primer and protective silicone rubber;

[0010] Ion blower, used to clean the surface of the workpiece to be processed;

[0011] Measuring system, used to measure injection trajectory to assist programming, workpiece error correction, injection trajectory error correction and glue coating quality inspection;

[0012] A motion mechanism, arranged on the operating table, for realizing the movement of the glue coating machine, the ion blower and the measuring system relative to the working surface to be operated;

[0013] Feeder, used for feeding protective silicone rubber;

[0014] The control system is used to control the operation of the glue coating machine, ion blower, measuring system, motion mechanism and feeder.

[0015] The automatic coating device for protective silicone rubber provided by the present invention also has the following characteristics: the coating machine comprises a brush coating glue injection machine for coating the primer on the surface of the workpiece to be processed and a needle type glue injection valve for coating the protective silicone rubber on the surface to be coated with the primer.

[0016] The brush glue injection machine is installed on the motion mechanism through the first slide cylinder, and the needle glue injection valve is installed on the motion mechanism through the second slide cylinder.

[0017] The brush glue injection machine adopts compressed air for pressure supply, and the needle type glue injection valve adopts a feeder for material supply.

[0018] The automatic coating device for protecting silicone rubber provided by the present invention also has the following characteristics: the coating machine includes a brush coating glue injection machine and a needle type glue injection valve, and the measuring system includes:

[0019] The visual measurement camera is installed directly below the motion mechanism to measure the injection trajectory, workpiece error, coating width and appearance quality of the primer and protective silicone rubber;

[0020] Color laser coaxial displacement meter, installed close to the needle injection valve, used for needle injection valve track height, workpiece height error, injection track height error and coating thickness detection;

[0021] The first CMOS laser displacement sensor is installed next to the color laser coaxial displacement meter and is used to measure the height of the workpiece after the primer or protective silicone rubber coating is completed, so as to detect the thickness of the primer and protective silicone rubber coating;

[0022] The second CMOS laser displacement sensor is installed close to the brush coating glue injection machine and is used to detect the height error of the glue injection track of the brush coating glue injection machine.

[0023] The automatic coating device for protecting silicone rubber provided by the present invention also has the following characteristics: the motion mechanism includes a turntable installed on the operating table for driving the workpiece to be processed to rotate around the vertical axis and an adapter for connecting the glue coating machine, the ion air gun and the measuring system.

[0024] The adapter is connected to the operating table via a mechanical arm, and the mechanical arm drives the adapter to move.

[0025] The automatic coating device for protecting silicone rubber provided by the present invention also has the following feature: the turntable is provided with a plurality of positioning pins for realizing precise positioning of the workpiece to be processed.

[0026] Another object of the present invention is to provide an automated coating method for protecting silicone rubber, wherein the coating method uses any of the coating devices described above and comprises the following steps:

[0027] S1: Control the motion mechanism through the control system, and use the measurement system to assist in determining the gluing position, and program to determine the gluing motion trajectory and gluing position;

[0028] S2: Mount the workpiece to be processed on the motion mechanism, control the measurement system to perform feature detection and height detection on the workpiece to be processed, and correct the gluing motion trajectory according to the measurement results;

[0029] S3: The control system controls the movement of the motion mechanism and controls the ion air gun to clean the surface of the workpiece;

[0030] S4: Apply primer by brushing;

[0031] S5: After the primer is dried, the appearance quality and thickness of the primer are tested by the measuring system. If the test is qualified, S6 is performed. If the test is unqualified, an error is reported;

[0032] S6: Perform protective silicone rubber coating;

[0033] S7: After the silicone rubber is dry, the appearance quality of the protective silicone rubber and the coating thickness of the protective silicone rubber are detected by the measuring system.

[0034] The automatic coating method provided by the present invention also has the following characteristics: S4 comprises: the control system controls the first slide cylinder to move so that the brush coating glue injection machine extends out to apply the primer, and controls the first slide cylinder to move so that the brush coating glue injection machine retracts after the primer is applied.

[0035] During the brush coating process, the measurement system measures the glue injection trajectory of the brush coating glue injection machine in real time, and feeds back the glue injection trajectory information to the control system to adjust the glue injection trajectory in real time to correct the error.

[0036] The automatic coating method provided by the present invention also has the following feature: the primer thickness is calculated from the primer height measured by the color laser coaxial displacement meter and the workpiece height measured by the first CMOS laser displacement sensor.

[0037] The automatic coating method provided by the present invention also has the following characteristics: S6 comprises: the control system controls the movement of the second slide cylinder to extend the needle-type glue injection valve to coat the protective silicone rubber, and controls the feeder to feed the material, and controls the movement of the second slide cylinder to retract the needle-type glue injection valve after the coating is completed.

[0038] During the silicone rubber coating process, the measurement system measures the coating trajectory of the needle-type injection valve in real time, and feeds back the coating trajectory information to the control system to adjust the coating trajectory in real time to correct the error.

[0039] The automatic coating method provided by the present invention also has the following feature: the silicone rubber coating thickness is calculated based on the protective silicone rubber height measured by the color laser coaxial displacement meter and the workpiece height measured by the first CMOS laser displacement sensor.

[0040] Beneficial Effects

[0041] The coating device provided by the present invention is provided with a motion mechanism combining a turntable and a mechanical arm, which can realize the gluing trajectory movement of large-sized and complex-shaped workpieces; the visual measurement camera, the color laser coaxial displacement meter and the CMOS laser displacement sensor are adopted, which can accurately plan the gluing path, make corrections for specific workpieces, and correct the gluing trajectory of the motion mechanism in real time in response to various surface materials of workpieces to be glued; the brush coating glue injection machine and the needle-type glue injection valve are combined with the slide cylinder to realize one mechanical arm driving multiple glue injection heads to complete the coating of low-fluidity silicone rubber and high-fluidity primer, and avoid interference between the device and the workpiece; at the same time, the color laser coaxial displacement meter is combined with the CMOS laser displacement sensor to realize the accurate detection of the coating thickness of the surface protective silicone rubber (including primer) of various materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 A schematic diagram of the structure of a coating device provided in an embodiment of the present invention;

[0044] Figure 2 for Figure 1 A magnified schematic diagram of the frame;

[0045] Figure 3 for Figure 1 A side view of the frame.

[0046] Among them, 1: operating table, 2: motion mechanism, 2a: turntable, 2b: robotic arm, 2c: adapter, 3: glue coating machine, 3a: brush glue injection machine, 3b: first slide cylinder, 3c: needle glue injection valve, 3d: second slide cylinder, 4: ion air gun, 5: measurement system, 5a: visual measurement camera, 5b: color laser coaxial displacement meter, 5c: first CMOS laser displacement sensor, 5d: second CMOS laser displacement sensor, 6: feeder, 7: control system. DETAILED DESCRIPTION

[0047] The present application is further described in detail below in conjunction with the accompanying drawings and examples, but it should be noted that these implementation methods are not limitations of the present application, and equivalent changes or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these implementation methods are all within the scope of protection of the present application.

[0048] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the creation of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the creation of the present application.

[0049] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0050] The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention of this application can be understood by specific circumstances.

[0051] like Figure 1-3 As shown, an embodiment of the present application provides an automatic coating device for protecting silicone rubber, the device comprising:

[0052] The operating table 1 is used as a supporting platform of the equipment to provide a working space;

[0053] Glue coating machine 3, used for coating the primer and protective silicone rubber;

[0054] Ion fan 4, used for cleaning the surface of the workpiece to be processed;

[0055] Measuring system 5, used for measuring injection trajectory to assist programming, workpiece error correction, injection trajectory error correction and glue coating quality inspection;

[0056] The motion mechanism 2 is arranged on the operating table 1 and is used to realize the movement of the glue coating machine 3, the ion blower 4 and the measuring system 5 relative to the working surface to be operated;

[0057] Feeder 6, used for feeding protective silicone rubber;

[0058] The control system 7 is used to control the operation of the glue coating machine 3, the ion blower 4, the measuring system 5, the motion mechanism 2 and the feeder 6.

[0059] In some embodiments, the glue coating machine 3 includes a brush glue injection machine 3a for applying the primer on the surface of the workpiece to be processed and a needle glue injection valve 3c for applying the protective silicone rubber on the surface to be primed.

[0060] The brush glue injection machine 3a is installed on the motion mechanism 2 through the first slide cylinder 3b, and the needle glue injection valve 3c is installed on the motion mechanism 2 through the second slide cylinder 3d. The second slide cylinder 3d drives the needle glue injection valve 3c to move, thereby avoiding interference between the brush glue injection machine 3a or the needle glue injection valve 3c and the workpiece to be operated during operation.

[0061] The brush glue injection machine 3a uses compressed air for pressure supply, and the needle glue injection valve 3c uses a feeder 6 for material supply.

[0062] In some embodiments, the glue coating machine 3 includes a brush glue injection machine 3a and a needle glue injection valve 3c, and the measurement system 5 includes:

[0063] The visual measurement camera 5a is installed directly below the motion mechanism 2 and is used to measure the injection trajectory, workpiece error, coating width and appearance quality of the primer and protective silicone rubber;

[0064] Color laser coaxial displacement meter 5b, installed close to needle-type glue injection valve 3c, used for detecting track height of needle-type glue injection valve 3c, workpiece height error, glue injection track height error and coating thickness;

[0065] The first CMOS laser displacement sensor 5c is installed next to the color laser coaxial displacement meter and is used to measure the height of the workpiece after the primer or protective silicone rubber coating is completed, so as to detect the thickness of the primer and protective silicone rubber coating;

[0066] The second CMOS laser displacement sensor 5d is installed adjacent to the brush glue injection machine 3a and is used to detect the height error of the glue injection track of the brush glue injection machine 3a.

[0067] In some embodiments, the motion mechanism 2 includes a turntable 2a installed on the operating table 1 for driving the workpiece to be operated to rotate around a vertical axis and an adapter 2c for connecting the glue coating machine 3, the ion air gun 4 and the measuring system 5.

[0068] The adapter 2c is connected to the operating platform 1 via a mechanical arm 2b, and the mechanical arm 2b drives the adapter 2c to move.

[0069] In some embodiments, the turntable 2a is provided with a plurality of positioning pins for achieving precise positioning of the workpiece to be processed.

[0070] In some embodiments, an automated coating method for protecting silicone rubber is provided, wherein the coating method uses the coating device described in any of the above embodiments, and comprises the following steps:

[0071] S1: Control the motion mechanism 2 through the control system, and use the measurement system 5 to assist in determining the gluing position, and program to determine the gluing motion trajectory and the gluing position;

[0072] S2: Mount the workpiece to be processed on the motion mechanism 2, control the measuring system 5 to perform feature detection and height detection on the workpiece to be processed, and correct the gluing motion trajectory according to the measurement results;

[0073] S3: The control system 7 controls the movement of the motion mechanism 2 and controls the ion air gun 4 to clean the surface of the workpiece;

[0074] S4: Apply primer by brushing;

[0075] S5: After the primer is dried, the appearance quality and thickness of the primer are detected by the measuring system 5. If the detection is qualified, S6 is performed. If the detection is unqualified, an error is reported;

[0076] S6: Perform protective silicone rubber coating;

[0077] S7: After the silicone rubber is dry, the appearance quality of the protective silicone rubber and the coating thickness of the protective silicone rubber are detected by the measuring system 5.

[0078] In some embodiments, S4 includes: the control system 7 controls the first slide cylinder 3b to move so that the brush coating glue injection machine 3a extends out to apply the primer, and controls the first slide cylinder 3b to move so that the brush coating glue injection machine 3a retracts after the primer is applied.

[0079] During the brush coating process, the visual measurement camera 5a and the second CMOS laser displacement sensor 5d measure the glue injection trajectory of the brush coating glue injection machine 3a in real time, and feed back the glue injection trajectory information to the control system 7 to adjust the glue injection trajectory in real time to correct the error.

[0080] In some embodiments, the primer thickness is calculated based on the primer height measured by the color laser coaxial displacement meter 5b and the workpiece height measured by the first CMOS laser displacement sensor 5c.

[0081] In some embodiments, S6 includes: the control system 7 controls the second slide cylinder 3d to move so that the needle-type glue injection valve 3c extends out to coat the protective silicone rubber, and controls the feeder 6 to feed the material, and controls the second slide cylinder 3d to move so that the needle-type glue injection valve 3c is retracted after the coating is completed.

[0082] During the silicone rubber coating process, the measuring system 5 measures the coating trajectory of the needle-type glue injection valve 3c in real time, and feeds back the coating trajectory information to the control system 7 to adjust the coating trajectory in real time to correct the error.

[0083] In some embodiments, the silicone rubber coating thickness is calculated based on the protective silicone rubber height measured by the color laser coaxial displacement meter 5b and the workpiece height measured by the first CMOS laser displacement sensor 5c.

[0084] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. An automatic coating device for protecting silicone rubber, characterized in that: The device comprises: The operating table is used as a supporting platform for the equipment to provide working space; Glue coating machine, used for coating the primer and protective silicone rubber; Ion blower, used to clean the surface of the workpiece to be processed; Measuring system, used to measure injection trajectory to assist programming, workpiece error correction, injection trajectory error correction and glue coating quality inspection; A motion mechanism, arranged on the operating table, for realizing the movement of the glue coating machine, the ion blower and the measuring system relative to the working surface to be operated; Feeder, used for feeding protective silicone rubber; The control system is used to control the operation of the glue coating machine, ion blower, measuring system, motion mechanism and feeder.

2. The automatic coating device for protecting silicone rubber according to claim 1, characterized in that: The glue coating machine includes a brush glue injection machine for applying the primer on the surface of the workpiece to be processed and a needle-type glue injection valve for applying the protective silicone rubber on the surface to be primed. The brush glue injection machine is installed on the motion mechanism through the first slide cylinder, and the needle glue injection valve is installed on the motion mechanism through the second slide cylinder. The brush glue injection machine adopts compressed air for pressure supply, and the needle type glue injection valve adopts a feeder for material supply.

3. The automatic coating device for protecting silicone rubber according to claim 1, characterized in that: The glue coating machine includes a brush glue injection machine and a needle glue injection valve, and the measuring system includes: The visual measurement camera is installed directly below the motion mechanism to measure the injection trajectory, workpiece error, coating width and appearance quality of the primer and protective silicone rubber; Color laser coaxial displacement meter, installed close to the needle injection valve, used for needle injection valve track height, workpiece height error, injection track height error and coating thickness detection; The first CMOS laser displacement sensor is installed next to the color laser coaxial displacement meter and is used to measure the height of the workpiece after the primer or protective silicone rubber coating is completed, so as to detect the thickness of the primer and protective silicone rubber coating; The second CMOS laser displacement sensor is installed close to the brush coating glue injection machine and is used to detect the height error of the glue injection track of the brush coating glue injection machine.

4. The automatic coating device for protecting silicone rubber according to claim 1, characterized in that: The motion mechanism includes a turntable installed on the operating table for driving the workpiece to be processed to rotate around a vertical axis and an adapter for connecting the glue coating machine, the ion air gun and the measuring system. The adapter is connected to the operating table via a mechanical arm, and the mechanical arm drives the adapter to move.

5. The automatic coating device for protecting silicone rubber according to claim 4, characterized in that: The turntable is provided with a plurality of positioning pins for realizing precise positioning of the workpiece to be processed.

6. An automated coating method for protecting silicone rubber, characterized in that: The coating method adopts the coating device according to any one of claims 1 to 5, comprising the following steps: S1: Control the motion mechanism through the control system, and use the measurement system to assist in determining the gluing position, and program to determine the gluing motion trajectory and gluing position; S2: Mount the workpiece to be processed on the motion mechanism, control the measurement system to perform feature detection and height detection on the workpiece to be processed, and correct the gluing motion trajectory according to the measurement results; S3: The control system controls the movement of the motion mechanism and controls the ion air gun to clean the surface of the workpiece; S4: Apply primer by brushing; S5: After the primer is dried, the appearance quality and thickness of the primer are tested by the measuring system. If the test is qualified, S6 is performed. If the test is unqualified, an error is reported; S6: Perform protective silicone rubber coating; S7: After the silicone rubber is dry, the appearance quality of the protective silicone rubber and the coating thickness of the protective silicone rubber are detected by the measuring system.

7. The automated coating method according to claim 6, characterized in that: S4 includes: the control system controls the first slide cylinder to move so that the brush coating glue injection machine extends out to apply the primer, and controls the first slide cylinder to move so that the brush coating glue injection machine retracts after the primer is applied. During the brush coating process, the measurement system measures the glue injection trajectory of the brush coating glue injection machine in real time, and feeds back the glue injection trajectory information to the control system to adjust the glue injection trajectory in real time to correct the error.

8. The automated coating method according to claim 6, characterized in that: The primer thickness is calculated based on the primer height measured by the color laser coaxial displacement meter and the workpiece height measured by the first CMOS laser displacement sensor.

9. The automated coating method according to claim 6, characterized in that: S6 includes: the control system controls the movement of the second slide cylinder to extend the needle-type glue injection valve to coat the protective silicone rubber, and controls the feeder to feed the material, and controls the movement of the second slide cylinder to retract the needle-type glue injection valve after the coating is completed. During the silicone rubber coating process, the measurement system measures the coating trajectory of the needle-type injection valve in real time, and feeds back the coating trajectory information to the control system to adjust the coating trajectory in real time to correct the error.

10. The automated coating method according to claim 6, characterized in that: The silicone rubber coating thickness is calculated based on the protective silicone rubber height measured by the color laser coaxial displacement meter and the workpiece height measured by the first CMOS laser displacement sensor.

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