WO2015067139A1

WO2015067139A1 - Painting apparatus and painting method

Info

Publication number: WO2015067139A1
Application number: PCT/CN2014/089813
Authority: WO
Inventors: 张庆威
Original assignee: 四维尔丸井(广州)汽车零部件有限公司
Priority date: 2013-11-08
Filing date: 2014-10-29
Publication date: 2015-05-14
Also published as: CN103586169B; CN103586169A

Abstract

A painting apparatus comprises a needle (120) provided with paint, a clamp (110) located below the needle (120), wherein the clamp (110) and the needle (120) can move relatively in a horizontal direction and in a vertical direction, an imaging apparatus located above the clamp (110), a height measurement apparatus and a control apparatus; wherein, the needle (120) can move vertically relative to the clamp (110), the needle (120) is connected to a flow control apparatus, and the imaging apparatus, the height measurement apparatus and the flow control apparatus are all connected to the control apparatus. Also related is a painting method. During painting, the flow control apparatus controls an injection amount of the paint of the needle and a switch of a valve. During an injection process, the control apparatus controls relative positions of the clamp and the needle in the horizontal direction and in the vertical direction to ensure that the needle performs point injection based on a previously determined point injection track, and controls the needle to move vertically relative to the clamp to ensure that a distance between the needle and a surface of a product to be painted is constant. The painting apparatus and the painting method can reduce painting processes and improve product yield.

Description

Coating device and painting method

Technical field

The invention relates to the field of automobile parts production, in particular to a painting device and a coating method.

Background technique

There are a lot of plaques and signage parts on the car, which need to be partially painted to a specific color to make it stand out and beautiful. For example, the letters A, B, and C of the label of a car brand need to be painted black according to the requirements of the design drawings. For such products that only need to be painted on the surface area of the parts, it is necessary to use a cover when manufacturing, to cover the parts that do not need to be painted other than the parts of the parts, and then to paint the letter areas that need to be painted.

Before painting, you need to open the top cover of the cover, place the parts on the corresponding base of the cover, then lock the cover of the cover and spray with a common compressed air spray gun. The above steps are all manual operation. After painting is completed. Open the cover and remove the parts. For every 5-8 parts sprayed, it is necessary to use solvent to clean the paint accumulated on the top cover. Due to the manufacturing precision of the cover and the slight deformation of the product during the above painting process, there are always some small gaps on the surface of the cover and the parts of the cover. Therefore, some of the paint mist that is liquefied by compressed air will fly through the gap. Painted area. Therefore, after each painting is completed, it is necessary to enter the manual cleaning process, wipe the paint mist splashed into these areas, and then send it to the oven to dry the paint.

Summary of the invention

Based on this, the present invention overcomes the deficiencies of the prior art and provides a coating apparatus and a coating method that reduce the coating process and improve the yield of the product.

Its technical solutions are as follows:

A painting device comprising a needle provided with paint, a clamp located below the needle, the clamp and the needle being movable relative to each other in a lateral direction and a longitudinal direction, and an imaging device located above the clamp, measuring height a device and a control device; wherein the needle is vertically movable relative to the clamp, the needle is coupled to a flow control device, the imaging device, the height measuring device, and the flow control device Both are connected to the control device.

The following is a description of further technical solutions:

Preferably, the jig is provided with a recess having a shape that matches the raised structure on the back of the product to be coated.

Preferably, the flow control device includes a gas pipe in communication with the needle, a pulse device connected to the gas pipe, and the gas pipe and the pulse device are controlled by a pulse valve.

Preferably, the method further includes a moving platform located below the needle, the moving platform is slidably fixed to the first sliding rail, the first sliding rail is laterally disposed or longitudinally disposed; the needle passes the second sliding The rail is slidably fixed to a bracket above the clamp, the second slide rail is vertically disposed; the second slide rail is slidably fixed to the bracket above the clamp by a third slide rail, the third The rails are set in portrait or landscape orientation.

Preferably, the height measuring device is a laser height measuring device, and the laser height measuring device comprises a laser emitting head, and the laser emitting head is disposed above the clamp.

Preferably, the imaging device includes a camera and a display device connected to the camera, the camera is mounted above the clamp, and the display device is connected to the control device.

A coating method comprising:

(1) placing the product to be coated on the fixture and placing the fixture on the moving platform;

(2) the image forming device captures an image of the product to be painted;

(3) determining coordinates of a plurality of points on the product to be painted according to the captured image;

(4) the height measuring device measures the height of the product to be painted, and sends the height information to the control device;

(5) The control device changes the relative position of the needle and the clamp according to the coordinates determined in the step (3), realizes painting for each coordinate point, and controls the height of the needle according to the height information measured in the step (4), ensuring the needle and the waiting The surface distance of the coated product is constant.

Preferably, in step (3), according to image information of the product to be coated, coordinates of a plurality of coordinate points are determined by using a relative coordinate system, and the plurality of coordinate points are sequentially connected to form a product to be coated, and the plurality of coordinates The point is the paint spray point.

Preferably, in the step (5), the paint flow rate of the needle is changed by the opening degree of the air pressure control valve, the valve is closed when the paint is not required to be spotted, and the cylinder is switched to the negative pressure by the pneumatic valve, and is required When the paint is spotted, the valve opens and the air pressure is switched to the set positive pressure through the pneumatic valve.

Preferably, in step (5), moving the clamp changes its longitudinal position, moving the needle to change its lateral position, and moving the second slide to change the vertical position of the needle.

The principles, effects, and the like of the foregoing technical solutions are described below:

1. During painting, the corresponding product to be coated is mounted on the jig, and the image information to be painted is scanned by the image forming device; and a plurality of coordinate points are sequentially set along the groove of the product to be coated according to the image information. And connecting a plurality of straight lines between the coordinate points to form a shape of the product to be coated, and the plurality of coordinate points are the spot points of the paint when the needle is spotted; and the height of the product to be coated by the height measuring device Scanning to determine the height change of the surface of the product to be coated; at the time of painting, the flow control device controls the amount of paint sprayed on the needle and the switch of the valve, and during the injection process, the control device controls the clamp and the needle The lateral, longitudinal relative position ensures that the needle is spotted according to the previously determined patency track, and the needle is controlled to move vertically relative to the clamp, ensuring a constant distance between the needle and the surface of the product to be coated.

2. Because the car's plate, signage and the words to be painted have a concave structure, the painting device directly passes the paint through the needle, and accurately places it into the concave structure of the word and the mark, because the paint has a certain infiltration flow. Sex, the paint can cover all areas of the word and the bottom of the mark to achieve the same appearance quality as the existing painting process.

3. The coating device or painting method only needs to set the paint spot trajectory once, can finish the painting of the same shape product, has strong repeatability and improves the painting efficiency; the entire painting process belongs to a completely static point injection mode. It will not produce paint mist, effectively improve the utilization rate of paint, increase the paint utilization rate from the existing 5.0% to 99.9%, and do not need to carry out paint cleaning, which not only can effectively avoid scratching the product during the cleaning process, and avoid The solvent used to clean the mask, the wipes required to clean the product, the odor generated by the organic solvent, etc. pose a threat to the worker's body, and also reduce the waste of a large amount of waste water, waste paint residue, waste solvent, waste wipes, etc. The production of things.

DRAWINGS

1 is a schematic structural view of a painting apparatus according to an embodiment of the present invention;

2 is a schematic view showing a coordinate point setting of a painting method according to an embodiment of the present invention.

Description of the reference signs:

100, bracket, 101, side, 102, bottom, 103, mobile platform, 104, longitudinal rail, 105, vertical rail, 106, fixed frame, 107, horizontal rail, 110, fixture, 120, needle, 130, Camera, 131, display device, 140, laser emitting head, 150, pulse device, 1-6, coordinate points.

detailed description

The embodiments of the present invention are described in detail below:

As shown in FIG. 1, a painting apparatus includes a bracket 100 on which a clamp 110 is slidably mounted, and the needle 120 is slidably mounted above the clamp 110, above the clamp 110. There is further provided a laser emitting head 140 of the camera 130 and the laser height measuring device, a flow control device connected to the needle 120 for controlling the flow rate and the opening degree thereof, and a control device, the camera 130 and the laser height measuring device. And the flow control device is connected to the control device; wherein the needle 120 is vertically movable relative to the clamp 110, and the lateral, longitudinal and vertical distances of the needle 120 and the clamp 110 are controlled to enable the needle 120 to The spotting point of each product to be coated (plate, sign) placed on the jig 110 is injected into the paint.

The clamp 110 is provided with a plurality of recesses, the shape of the recesses is matched with the convex structure on the back of the product to be coated, and each recess is correspondingly fixed with a product to be coated to ensure that each of the placed products is to be painted. Product stability. Preferably, the flatness of the jig 110 is less than 0.005 mm, and the X/Y dimension deviation of the plurality of recesses is less than 0.005 mm.

The needle 120 is provided with a syringe, and a needle is arranged below the syringe. The syringe is filled with paint, and the syringe is connected to the paint storage device through the paint supply tube to ensure the supply requirement of the needle.

The bracket 100 includes a side portion 101 and a bottom portion 102. The bottom portion 102 is provided with a longitudinal rail 104. The longitudinal rail 104 is slidably fixed with a moving platform 103, and the clamp 120 is fixed on the moving platform 103. The moving platform 103 is driven by the power unit to realize the movement on the longitudinal rail 104 (the longitudinally disposed first rail), and the longitudinal position of the clamp 110 and the needle 120 is changed. The side portion 101 is fixed to one side of the bottom portion 102, and a side of the side portion 101 opposite to the bottom portion 102 is provided with a vertical sliding rail 105 (ie, a vertically disposed second sliding rail), the vertical sliding A fixing frame 106 is slidably disposed on the rail 105. The needle 120, the camera 130 and the laser emitting head 140 are fixed on the fixing frame 106, and the fixing frame 106 is pushed by the power device to change the needle and the clamp of the needle 120 ( The relative position of the product to be coated). The side portion 101 is further provided with a lateral slide rail 107 (third in the lateral direction) The slide rail 105 is slidably fixed to the lateral slide rail 107, and the lateral slide rail 107 changes the lateral relative position of the needle to the product to be coated.

The flow control device includes a gas pipe communicating with the paint supply tube of the needle 120, a pulse device 150 communicating with the gas pipe, and a pressure between the gas pipe and the pulse device through a pulse valve to control the gas pipe.

The imaging device includes a camera 130 and a display device 131 connected to the camera 130. When painting, the product to be painted is scanned by the camera 130, and the scanned image is transmitted to the display device 131, and multiple coordinates are determined according to the displayed content. Point, a plurality of linear connections between the coordinate points form a product to be coated, and measure coordinate data of a plurality of coordinate points of the product to be coated, and the plurality of coordinate points are paint point points during painting .

A painting method using the above coating device, comprising:

(1) placing the product to be coated on the jig 110, and placing the jig 110 on the moving platform 103;

(2) the image forming device captures an image of the product to be painted;

Each of the clamps 110 is provided with a plurality of products to be coated, and the needle point trajectory is determined by the step (3), and the height change data of the surface of the product to be coated is obtained through the step (4), and the plurality of products can be continuously completed. Painting work.

Wherein, in the step (1), the jig 110 matching the convex structure of the back of the product to be coated is first selected, and the jig 110 is fixed on the moving platform 103, and the protrusions on the back of the product to be coated are attached to the jig. The recessed portion cooperates with the product to be coated to avoid the accuracy of moving the image to be coated when the product is painted. Preferably, each product corresponds to one jig 110, and each jig 110 is provided with a plurality of recesses in the lateral direction and the longitudinal direction, respectively, which can be used for fixing a plurality of products to be coated.

In the step (2), the camera 130 performs photographing in an area of one of the products to be coated, and transmits the photographed image to the display device 131. In step (3), a coordinate system is established according to the displayed image, The coordinates of any inflection point on the product to be painted are calculated, and the coordinates of the plurality of coordinate points are determined. The plurality of coordinate points are sequentially connected to form a product to be painted, and the plurality of coordinate points are the injection points of the needle. As shown in FIG. 2, in this embodiment, taking the letter “N” as an example, it is necessary to determine six coordinate points 1-6, and the lines between the six coordinate points 1-6 constitute the letter “N”.

In the step (4), the laser height measuring device is used to measure the height of the painted product, the height difference of the surface of the product to be coated is obtained, and the height difference data is sent to the control device.

Wherein, step (2) and step (3) may be interchanged with step (4), first determining a plurality of coordinate points of the product to be coated or first determining a height difference of the surface of the product to be coated.

In the step (5), the paint flow rate of the needle 120 is changed by the degree of opening of the air pressure control valve, preferably the spot flow rate of the needle is 0.005 g/time, and the pulse frequency is 20-100 times/second. When the paint is not required, the pulse valve is closed, the cylinder is switched to a negative pressure by the pneumatic valve to ensure that the paint does not flow out of the needle; when the paint is required to be applied, the pulse valve is opened, and the air pressure is switched to the set positive pressure by the pneumatic valve. Paint out.

In step (5), in order to ensure that the needle 120 can be spotted according to a plurality of coordinate points determined in the step (3), the cooperation of the moving platform 103 with the longitudinal rail 104, and the vertical rail 105 and the The cooperation of the lateral slide rail 107 changes the longitudinal and lateral distance between the needle and the product to be coated.

Most of the parts currently produced have a curved surface. The highest and lowest words on the same part can be up to 5 mm. For example, in the NXXSXX standard, the letter S is in the plane than the letter N. The plane at the location should be 4mm higher, and the distance between the needle and the bottom of the mark must be within the range of 0.20mm ± 0.02mm. Because the distance is small, the needle will be hit due to the tolerance of the product Z direction; if the distance is too large After the paint comes out of the needle, it does not reach the surface of the product and accumulates. As a result, the flow rate of the spotting is unstable and discontinuous, and the product parts are defective. Therefore, it is necessary to control the needle in the precise Z direction to ensure that the needle is always applied along the curved surface of the component at a certain distance from the bottom surface of the word and the target during the point injection process. Therefore, in the step (5), the holder 107 can be vertically moved on the vertical rail 106 in accordance with the result of the laser height measuring device, ensuring that the distance between the needle of the needle 120 and the surface of the product to be coated is constant.

The above-mentioned embodiments are merely illustrative of specific embodiments of the invention, and the description thereof is not to be construed as limiting the scope of the invention. It should be noted that for the field A person skilled in the art can make several modifications and improvements without departing from the spirit and scope of the invention.

Claims

A painting apparatus comprising: a needle provided with paint, a clamp located below the needle, the clamp and the needle being movable relative to each other in a lateral direction and a longitudinal direction, and imaging located above the clamp a device, a height measuring device and a control device; wherein the needle is vertically movable relative to the clamp, the needle is connected to a flow control device, and the imaging device, the height measuring device and the flow control device are both The control device is connected.
A painting apparatus according to claim 1, wherein said jig is provided with a recess having a shape matching a convex structure on the back of the product to be coated.
The painting apparatus according to claim 1, wherein said flow rate control means comprises a gas pipe communicating with said needle, and a pulse means connected to said gas pipe, said gas pipe and said pulse means being controlled by a pulse valve.
The painting apparatus according to claim 1, further comprising a moving platform located below the needle, the moving platform is slidably fixed to the first sliding rail, and the first sliding rail is laterally disposed Or longitudinally disposed; the needle is slidably fixed to the bracket above the clamp by the second slide rail, the second slide rail is vertically disposed; the second slide rail is slidably fixed to the seventh slide rail by the third slide rail The third slide rail is disposed longitudinally or laterally on the bracket above the clamp.
The painting apparatus according to claim 1, wherein the height measuring device is a laser height measuring device, and the laser height measuring device includes a laser emitting head, and the laser emitting head is disposed above the jig.
The painting apparatus according to claim 1, wherein the image forming apparatus comprises a camera and a display device connected to the camera, the camera is mounted above the jig, and the display device and the control device connection.
A painting method, comprising:

(1) placing the product to be coated on the fixture and placing the fixture on the moving platform;

(2) the image forming device captures an image of the product to be painted;

(3) determining coordinates of a plurality of points on the product to be painted according to the captured image;

(4) the height measuring device measures the height of the product to be painted, and sends the height information to the control device;

(5) The control device changes the relative position of the needle and the clamp according to the coordinates determined in step (3), It is possible to paint each coordinate point and control the height of the needle according to the height information measured in step (4) to ensure a constant distance between the needle and the surface of the product to be coated.
The painting method according to claim 7, wherein in step (3), according to image information of the product to be coated, coordinates of a plurality of coordinate points are determined by using a relative coordinate system, and the plurality of coordinate points are sequentially Connected to form a product to be coated, the plurality of coordinate points are paint injection points.
The painting method according to claim 7, wherein in the step (5), the paint flow rate of the needle is changed by the opening degree of the air pressure control valve, the valve is closed when the paint is not required to be spotted, and the cylinder passes the air pressure. The valve is switched to a negative pressure. When the paint is required to be spotted, the valve is opened and the air pressure is switched to the set positive pressure by the pneumatic valve.
The painting method according to claim 7 or 9, wherein in the step (5), moving the jig to change its longitudinal position, moving the needle to change its lateral position, and moving the second slide to change the vertical direction of the needle position.