JPS5851957A - Automatic painting method - Google Patents

Abstract

PURPOSE:To make it possible to form a painting surface with high quality, by automatically obtaining an optimum paint emitting amount and the width of a atomizing pattern corresponding to the painting part of an object to be painted by the control signal of a control panel. CONSTITUTION:The emitting amount of a paint and the width of an atomizing pattern squared with the surface configuration of an object 1 to be painted relatively moved with reference to a painting gun 3 are preliminarily stored in a control panel 4. That is, by the control signal of the control panel 4, the pressure of air for the pressure pattern of a paint and the width of an atomizing pattern are controlled corresponding to the painting part of the object 1 to be painted and the opening and closing of a needle valve and the intermission of the supply of atomizing air are automatically controlled corresponding to the painting part to carry out automatic painting. By this method, the high quality painting can be performed to the part to be painted in a optimum paint supply amount and the width of a spray pattern and the painting reducing the waste of a paint can be carried out even to a small area part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of automatically painting an object to be painted, such as an automobile body, which continuously moves relative to a painting gun using a painting robot or the like, Optimize the paint discharge amount and atomization pattern width accordingly,
The purpose is to provide a method for forming and applying high quality painted surfaces.

In the conventional automatic painting method using a painting robot,
It can only control the opening and closing of the needle valve of the robot's paint gun, and adjust the amount of paint discharged and the width of the atomization pattern.

Since it was impossible to change the coating, when painting parts with complex shapes such as automobile bodies, there were not only disadvantages such as sagging on the painted surface and uneven coating thickness. When painting a small area, the width of the atomization pattern is too wide, resulting in a large amount of paint being wasted.

The present invention provides an automatic painting method without the above-mentioned drawbacks by having the configuration described in the claims.
≠, Nodef A~ Hereinafter, the present invention will be described in detail based on the drawings schematically showing an apparatus for suitably carrying out the method of the present invention.

In the drawing, a painting gun 3 of a painting robot 2 is arranged opposite to an object 1 to be painted, which is an automobile body, which moves continuously in the direction of arrow (A).

A control panel 4 is installed to control the interlocking of the painting robot 2 and to control the painting conditions by the painting gun 3.

The control panel 4 controls the interlocking of the painting robot 2 using the drive signal line 5 based on the conditions stored in advance as described above.

The aforementioned painting gun 3 includes a paint pressure hose 6, a pattern air hose 7, and a needle valve opening/closing air hose 8. An air hose 9 for atomizing paint is connected.

The above-mentioned paint hose 6 is connected to a color change valve device 10, and the paint is applied to the painting area by receiving a color change instruction signal stored in the control panel 4 through a color instruction control signal line 11. will be changed accordingly.

The color change valve device 10 includes a paint pipe 121.
, 122... are piped, and each paint pipe 12 1
2 ... has an air-driven regulator 11 2 regulator 13. +132... are arranged, and each regulator 131, 132... is connected to a branch pipe 141'+142...
..., paint circulation pipes 151, 152, respectively.
..., each paint circulation pipe 151, 152...
- Pump P1. Paint tank 1 via P2...
It is connected to 61°162...

The aforementioned air-driven regulator 131, 132...
The electro-pneumatic converter 181゜it is connected by piping 1717.
2 182..., each electro-pneumatic converter 181, 182
-.- are connected to an air pipe 21 communicating with a compressed air source 20 by air pipes 191, 192, . . . . Further, the electro-pneumatic converters 181, 182, . . . are connected to paint pressure adjustment control signal lines 2222, . The paint is sent to the color change valve device 10 at a paint pressure of .

The above-mentioned pattern air hose 7 is connected to the air booster 23.
The air booster 23 is connected to the compressed air source 20 by an air pipe 24. This air booster 23 is connected to an electro-pneumatic converter 26 through a pipe 25, and the electro-pneumatic converter 26 is connected to the air pipe 21 through an air pipe 27 to a control signal line 28 for adjusting air pressure.

In addition, the air hose 8 for opening and closing the needle valve is connected to the solenoid valve 2.
The electromagnetic valve 29 is connected to the air piping 21 via an air piping 30 via a needle valve opening/closing control signal line 31 extending from the control panel 4 .

The air hose 9 for paint atomization is connected to the air pipe 24 by an air pipe 34 having an air regulator 33 via a solenoid valve 32. It is connected to the signal line 35. Note that the reference numeral 36 in the figure is an air pressure regulator.

As is clear from the above explanation, the control panel 4 includes
The operation order of the painting robot 2, the timing of opening and closing of the painting target, the amount of paint discharged, and the pattern air pressure.

It is assumed that the supply point of paint atomizing air and the like are stored in accordance with the specifications of the object 1 to be coated.

The structure of the method of the present invention using the above-mentioned apparatus is as follows.

Depending on the part of the object 1 to be painted, a signal from the control panel 4 is given to the painting robot 2 via a driving signal line 5, and the robot 2 guides the painting gun 3 to a predetermined position.

At the same time, the color to be applied is indicated by the color instruction control signal line 11.
is applied to the color change valve device 10 by
A paint system of a desired color is communicated with the paint hose 6, and
In order to obtain the optimal paint pressure for the area to be painted, a signal for adjusting the paint pressure is sent from the control panel 4 to the electro-pneumatic converter 181 or 182 through the control signal line 221 or 222 for adjusting the paint pressure, and the required paint is applied. The regulator 131 or 13 is controlled by the electro-pneumatic converter 181 or 182 from the paint tank 161 or 16 through the pump P or P2 and the paint circulation pipe 151 or 152.
Prepared to be sent to 2.

an air booster 2 connected to a compressed air source 20 by an air line 24;
3 is under the control of the electro-pneumatic converter 26, and the required pattern air is prepared to be sent to the painting gun 3 by the pattern air hose 7.

At this point, the compressed air to be sent to the needle valve opening/closing air hose 8 and the paint atomizing air hose 9 is sent from the compressed air source 20 via the air piping 27.24 to the solenoid valves 29.32, respectively. and the solenoid valve 2
9.32 is provided for sending signals from the control panel 4 via the needle valve opening/closing control signal line 31 and the paint atomizing air opening/closing control signal line 35.

After preparing as described above, when the control panel 4 is turned on, the electromagnetic valves 29 and 32 of the paint gun 3 are turned on, the needle valve is opened, and paint atomizing air is blown out. When spraying the paint, the painting robot 1-2 performs painting as scheduled as the object 1 moves.

That is, according to the present invention, the pressure of the paint pressure cover turn air, the atomization pattern, the interruption of the supply of the atomization air, and the atomization pattern, depending on the area to be coated on the object 1, are controlled by the control signal from the control panel 4.
The system automatically controls and performs painting according to the area to be painted, and it is possible to perform high-quality painting with the optimal paint discharge amount and spray pattern width for the area to be painted, and eliminates paint waste even on small areas. It produces a vine effect by applying a coating with a small amount of paint.

[Brief explanation of drawings]

The drawing is an operational circuit diagram in one example of implementation. 1: Object to be painted, 2: Painting robot, 3: Painting gun, 4:
control panel. Patent Applicant: Toyota Motor Corporation Agent: Tatsuya Ichikawa

Claims (1)

[Claims] The paint discharge amount and atomization pattern width that match the surface shape of the object to be painted that moves relative to the painting gun are stored in advance in the control panel, and the amount of paint discharged and the atomization pattern width that match the surface shape of the object to be painted that moves relative to the painting gun are stored in advance in the control panel. An automatic painting method characterized in that the amount of paint discharged from the paint gun and the width of the atomization pattern are controlled by signals based on the memory of the control panel.