JPH05277743A - Welding equipment for preventing spatter sticking - Google Patents

Abstract

PURPOSE:To easily remove spatters with the weak sticking force even if the spatters stick to the work surface by injecting a spatter sticking preventive liquid on the work surface surrounding a weld zone and performing weldiong before this sticking preventive liquid is dried. CONSTITUTION:In a welding robot 1 for arc welding provided with a column 2 and an arm 3, a spray device 4 to inject spray S of the spatter sticking preventive liquid is fitted on the tip of this arm 3. A wire holder 5 is fitted adjacently to this spray device 4, a welding wire 6 as a consumable electrode is held on this holder 5 and this welding wire is supplied successively from a delivering device 7. A controller 9 controls the robot 1 and an apparatus attached to this. Consequently, the spatter sticking preventive liquid is injected and welding is performed before this stuck liquid is dried. Accordingly, even if the spatters scatter and stick to the work surface, these can be scraped off by a wire brush, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding device which prevents spatters scattered during welding from adhering to the surface of a work.

[0002]

2. Description of the Related Art In arc welding, spatter scattered during welding is apt to adhere to the surface of a work in a fairly wide range, and in order to remove the adhered spatter, it must be separated by hitting it with a tool such as a chisel. Not only is it easy to scratch the work surface, it also requires a great deal of labor. Further, there is also known a means in which a spatter adhesion preventing liquid in which a synthetic resin, a surfactant and the like are mixed with water is hand-painted on a work surface with a brush, and the adhesion preventing liquid is dried before welding. Since the anti-adhesion effect is not always sufficient and non-uniform coating is apt to occur by hand coating, it is not possible to sufficiently prevent the adhesion of spatter. In addition, blow-holes may easily occur in the welded portion due to the anti-adhesion liquid.
As described in the specification of Japanese Patent No. 7691, a means for stopping the use of the spatter adhesion preventing agent and scraping off the adhered spatter with a brush is considered. However, it is considered that it is extremely difficult in practice to scrape off the spatter once attached with a brush.

[0003]

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

[0004]

Means for Solving the Problems In the present invention, the means for solving the above-mentioned problems are a robot for holding and operating a welding electrode on an arm, and a spray for applying a spatter adhesion preventing liquid, which is mounted near the electrode. And a control device for spraying the spatter adhesion preventing liquid onto the surface of the work by the spray device, and then performing a welding operation by the electrode within an undried time of the spatter adhesion preventing liquid. .

[0005]

Since the above means is provided, the spatter adhesion preventive agent is applied to the surface of the work just before welding, and the welding operation is performed before it is dried. Therefore, even if the spatter is scattered, it will drop onto the surface of the work that has been wet with the spatter adhesion preventing liquid, and will not adhere firmly to the work and can be easily removed.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a welding robot for arc welding,
2 is its column, 3 is an arm, and at the tip of the arm 3,
A spray device 4 for injecting a spray S of a spatter adhesion preventing liquid is attached, a wire holder 5 is attached adjacent to the spray device 4, a welding wire 6 as a consumable electrode is held on the wire holder 5, and the welding wire 6 is It is sequentially supplied from the feeding device 7. A balancer 8 balances the weight of the column 2, the arm 3 and the like, and a control device 9 controls the robot 1 and devices attached thereto.

A pressure tank 10 and a pipe line from an air supply pipe 11 for applying an air pressure to the pressure device 10 are connected to the spray device 4, of which a liquid supply pipe 12 is a bottom portion of the pressure tank 10. And the blast air pipe 13 branches off from the air supply pipe 11. Air pipe for spray valve 14
Is provided with a solenoid valve 15 which is branched from the air supply pipe 11, and the solenoid valve 15 is controlled by a control device 9 through a circuit 16 to turn on / off air pressure for opening and closing a spray valve 20 described later. To do. The circuit 1 controls the robot 1.

In FIG. 2, the spray device 4 includes an arm 3
It is fixed to a hand 18 extending from the wire holder 5 and a wire holder 5 is attached by a stay 19. A spray valve 20 is internally provided in the spray device 4, and the spray valve 20 is
It operates by the air pressure applied from the spray valve air pipe 14, opens and closes the passage from the liquid supply pipe 12 and the injection air pipe 13, and when the passage is opened, the spray S of the anti-spatter adhesion liquid is jetted from the nozzle 4a.

The work shown in FIG. 2 is an exhaust manifold made of a sheet metal indicated by 21. A flange plate 22 formed by cutting a stainless steel plate is provided with exhaust pipe connection holes 23 by burring for the number of cylinders, and an outer edge 24. Bend to increase rigidity and attach to the cylinder head near the outer edge 2
5, 26 are drilled, and in the connection hole 23,
An exhaust pipe 27 formed by cutting a stainless pipe is inserted and welded with a bead 28.

Prior to this welding, the spray device 4 sprays a spatter adhesion preventing liquid onto the surface of the flange plate 22, and welding is performed before the adhesion preventing liquid dries. Since the flange plate 22 is heated by welding heat, the injection of the anti-adhesion liquid is performed every time each hole is welded, or collectively in a range where it does not dry.

As described above, since the exhaust pipe 27 is welded while the surface of the flange plate 22 is wet with the anti-adhesion liquid, even if spatter is scattered and adheres to the surface, the adhesion is weak.
Can be scraped off with a wire brush, etc., without damaging the surface of the work.

[0012]

As described above, according to the present invention, the spatter adhesion preventing liquid is sprayed on the surface of the work surrounding the welded portion prior to welding, and the welding is performed before the adhesion preventing liquid dries.
Even if the spatter adheres, the adhesive force is weak and the spatter can be easily removed.

[Brief description of drawings]

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

[Fig. 2] Same as above but with enlarged view

[Explanation of symbols]

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

Claims (1)

[Claims] 1. A robot for operating a welding electrode by holding it on an arm, a spray device for applying a spatter adhesion preventing liquid applied near the electrode, and a spray device for preventing spatter adhesion on the surface of a work. A spatter adhesion preventing welding apparatus, comprising: a controller for spraying the liquid and then performing a welding operation by the electrode within an undried time of the spatter adhesion preventing liquid.