JP2652295B2 - Spatter adhesion prevention welding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding apparatus for preventing spatter scattered during welding from adhering to the surface of a work and the surface of a welding electrode .

[0002]

2. Description of the Related Art In arc welding, spatters scattered during welding are apt to adhere to the surface of a work in a considerably wide area. In order to remove the attached spatters, they must be separated by applying a blow with a chisel or other tool. This requires not only the work surface to be easily damaged but also a great deal of labor. In addition, there is also known a method in which a spatter adhesion preventing liquid in which a synthetic resin, a surfactant, etc. is mixed with water is manually applied to a work surface with a brush, and the adhesion preventing liquid is dried before welding. Sputter adhesion could not be sufficiently prevented because the effect of preventing adhesion was not always sufficient and non-uniform coating was likely to be applied by hand coating. In addition, since the adhesion preventing liquid may easily cause a blowhole in a welded portion, for example, the method described in Japanese Utility Model Application Laid-Open No.
As described in the specification of No. 7691, stop using sputter deposition inhibitor, means for scraping the deposited sputtered with a brush is also considered.

[0003] However, it is considered that it is actually extremely difficult to scrape off the spatter once adhered with a brush.

[0004]

SUMMARY OF THE INVENTION The present invention focuses on the fact that when the work surface is wet with a spatter anti-adhesion liquid, the anti-adhesion liquid has a high anti-adhesion effect and can be easily removed even if spatter adheres. It is an object of the present invention to enable easy and quick removal of spatter.

[0005]

Means for solving the above problems in the present invention are a robot for holding and operating a welding electrode on an arm, and a sputter attached to the arm so as to point to the tip end of the electrode. A spray device for applying an anti-adhesion liquid, and a control device that, after spraying the spatter anti-adhesion solution on the surface of the work by the spray device, performs a welding operation by the electrode within a time when the spatter anti-adhesion solution is not dried. It is characterized by having.

[0006]

Since the above means is provided, the work surface and the electrode
The surface is coated with a spatter adhesion inhibitor just before welding,
The welding operation is performed before this dries. Therefore, even if the spatter scatters, the surface of the work and the surface of the electrode are wet with the spatter adhesion preventing liquid.
Sputter does not adhere firmly, and even if it adheres, it can be easily removed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a robot for arc welding, 2 is a column thereof, 3 is an arm, and a spray device 4 for spraying a spray S of a spatter adhesion preventing liquid onto the tip of the arm 3.
Is attached, a wire holder 5 is attached adjacent to the spray device 4, and a welding wire 6 as a consumable electrode is held on the wire holder 5. The spray device 4 has a nozzle 4a.
It points to the tip side of the welding wire 6 and the wire holder 5.
The welding wire 6 is sequentially supplied from the feeding device 7 according to the consumption amount . 8 is column 2, arm 3
The balancer 9 balances weight with the like, and 9 is a control device for controlling the robot 1 and devices attached thereto.

The spray device 4 is connected to a pressurized tank 10 and a pipeline from an air supply pipe 11 for applying air pressure to the pressurized tank 10, of which a liquid supply pipe 12 is connected to the bottom of the pressurized tank 10. , The blast air pipe 13 branches off from the air supply pipe 11. Spray valve air tube 14
Has a solenoid valve 15 branched from the air supply pipe 11, and the solenoid valve 15 is controlled by a control device 9 via a circuit 16, and turns on and off an air pressure for opening and closing a spray valve 20 described later. I do. Further, the circuit 1 controls the robot 1.

In FIG. 2, the spray device 4 includes an arm 3
The wire holder 5 is fixed to the hand 18 extending from the hand 18. The spray device 4 has a spray valve 20 provided therein.
The air pressure applied from the spray valve air pipe 14 operates to open and close the passage from the liquid supply pipe 12 and the injection air pipe 13, and when the passage is opened and closed, spray S of the spatter adhesion preventing liquid is injected from the nozzle 4 a.

The workpiece shown in FIG. 2 is a sheet metal exhaust manifold indicated by reference numeral 21. A flange plate 22 formed by cutting a stainless steel plate is provided with burring exhaust pipe connection holes 23 by the number of cylinders. Is bent to increase rigidity, and the mounting hole 2 for the cylinder head near the outer edge
5, 26 are drilled, and in the connection hole 23,
An exhaust pipe 27 formed by cutting a stainless steel pipe is inserted and welded with a bead 28.

[0011] Prior to welding, the surface of the flange plate 22, sputter release liquid is injected by the spray device 4 which is operated by the control device 9, by the injection, off
Welding wire 6 as an electrode as well as the flange plate 22;
Spatter adhesion preventing liquid is also sprayed on the wire holder 5, and welding is performed before the adhesion preventing liquid dries. Since the flange plate 22 is heated by the welding heat and dries easily , the spray of the anti-adhesion liquid is performed every time each hole is welded, or is collectively performed within a range not drying.

As described above, the surface of the flange plate 22 and the electric
Since the exhaust pipe 27 is welded while the surface of the electrode is wet with the anti-adhesion liquid, even if spatter scatters on the surface of the flange plate and the surface of the electrode, the adhesion is prevented, and there is something that adheres. also <br/> adhesion is weak, can be scraping a wire brush or the like, it does not damage the surface of the workpiece and the electrode.

[0013]

The present invention as described above, according to the present invention, prior to the welding operation starts, since injecting the sputter release liquid to the work surface surrounding the weld by controlling the arm of the robot, the workpiece
The surface of the electrode attached to the arm as well as the surface
The anti-adhesion liquid is sprayed automatically. And since the welding is performed before the anti-adhesion liquid dries, the work or the electrode
Even if spatter adheres to the surface of the substrate, the adhesion is weak and an effect that the spatter can be easily removed is exhibited.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Welding robot 4 Spray device 6 Welding wire (electrode) 9 Control device 15 Solenoid valve

Claims (1)

(57) [Claims] 1. A robot for holding and operating a welding electrode on an arm, a spray device for applying a spatter anti-adhesion liquid attached to the arm pointing toward the distal end of the electrode, and the spray device. A spatter adhesion preventing welding apparatus, comprising: a control device for performing a welding operation by the electrode within a time when the spatter adhesion preventing liquid is sprayed on the surface of the work and before the spatter adhesion preventing liquid is dried.