JPS62212097A - Method for preventing sticking of welding spatter - Google Patents

Abstract

PURPOSE:To prevent the sticking of welding spatters by coating or spraying liquid to the surfaces of clamping members to form films thereon prior to or during welding. CONSTITUTION:Long holes 19a-19d which open to the surface in the longitudinal direction of the respective clamping members 11a-11d are provided. Base metals 14 and 15 to be welded are clamped by the clamping members 11a, 11b and 11c, 11d and are thereby set in the welding position; thereafter, a selector valve 16 is opened to pass compressed air. The liquid is mixed with the compressed air at the time when the compressed air passes a liquid mixer 17. The compressed air flows into the long holes 19a-19d and flows out the liquid from fine holes. The surfaces of the clamping members are cooled by the effect of the liquid films and are made hardly stickable with the spatters according to the above-mentioned method. The need for an intricate spatter removing device is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for preventing spatter scattered during welding from adhering to a clamping device.

[Prior Art] As an example of the conventional technology, FIG. 2 shows the configuration of an apparatus disclosed in Japanese Patent Application Laid-Open No. 51-121449. In the figure, (la), (lb), (lc) and (1d
) is a clamp member, and clamp members (1a) and (1b
) is configured to clamp one base material (not shown) from above and below, and clamp members (1c) and (1d) to clamp the other base material (not shown) from above and below. The navigation lamp members (la) and (1c) have a vertical movement function. (Ri is cutlery (3a), (3b)
A blade holder for spatter removal with a vertical movement function.

Next, the operation of the above device will be explained. Prior to welding, in order to clean the tips of the clamp members (la) to (1d), the clamp members (la) and (lc) are raised and opened to the clamp members (lb) and (ld). in,
Knife holder (grip device (LA), (LB)
and clamp members (lc) and (ld). At this time, the blades (3a) and (3b) are clamp members (
Since it slides in contact with the tips of la), (lb), (lc) and (1d), if any foreign matter such as spatter is attached, it will be scraped off by the blades (3a) and (3b). The scraped foreign matter such as spatter is blown away by air blasting or the like. Next, the blade holder (2) rises and retreats to the standby position. Next, the clamp member (la),
Clamp the base material to be welded with (lb), (lc), and (ld), and start welding work.

[Problems to be Solved by the Invention] The conventional spatter removal device for a welding device is configured as described above, and can remove spatter attached to the flat part of the tip of the clamp member. There has been a problem in that it is difficult to remove spatter adhering to complex surfaces such as surfaces.

If spatter adhering to the tip of the clamp member cannot be removed sufficiently, clamp the base metal together with the spatter during clamping, or use a diverne where a current flows between the tips of the clamp member when performing flash welding. This may cause welding defects such as

The present invention has been made to solve the above-mentioned problems, and provides a welding device that can omit or simplify the need for a cutter holder, cutter, etc. for removing spatter by preventing spatter from adhering to the surroundings of the clamp device. The purpose is to obtain.

[Means for Solving the Problems] The present invention has been made to solve the above problems.
A method for preventing the adhesion of welding spatter by applying or spraying a liquid to the surface of the clamp members prior to or during welding to form a film in an apparatus for welding by clamping base materials with respective clamp members. It provides:

With the above means, the clamp member in the welding device is cooled by the liquid on the surface where the high-temperature spatter collides due to the effect of the liquid film, and the temperature of the sputter decreases, so that the spatter does not adhere to the collided surface. It gets colder.

[Example] An example of the present invention will be described with reference to FIG. Figure 1(a)
1 is a configuration diagram of one embodiment of the present invention, and FIG. 1(b) is a partial front view of a clamp member. In the figure, (lla)
, Dtb), (11c) and (lid) are clamping members, which have the same clamping function as the clamping members (1a) to (1d) explained in FIG. A long piece (19a) in which a plurality of pores having openings are bored into the member.

(19b), (19c) and (19d) are provided in the length direction, respectively. (The direction is a switching valve, the primary side is connected to a compressed air source, and the liquid mixing device (17
)It is connected to the. (18a), (18b),
(18c) and (18d) are liquid mixing devices (17)
The length of the clamp members (Ia) to (1d) (19a)
- (19d) are flow rate regulating valves provided in the pipes connected to each other.

Next, the operation will be explained. Clamp members (11a), (1lb) and (llc
), (lid) and set it in the receptive position, open the switching valve (station) and let the compressed air flow. When the compressed air passes through the liquid mixing device (17), the liquid is sucked up by the ejector effect. Liquid is mixed with compressed air,
The elongated holes (1
9a) to (19d), and the liquid is further blown out from the pores. In this case, the averaging of the flow strength is achieved by the flow regulating valve (1
8a) to (lllld). Clamp member (l
The atomized liquid sprayed onto the surfaces of la) to (lid) is deposited uniformly on these surfaces to form a liquid film.

The overall adjustment of the amount of liquid blown out from the pores is performed by adjusting the operating time, the liquid mixing ratio by the liquid mixing device (17), and adjusting the flow rate regulating valves (18a) to (18d). Formation of the liquid film is usually performed before the welding operation, but may also be performed during welding.

Through the above operations, a liquid film is formed on the surface of the clamp member, so that even if high-temperature sputter collides with it, adhesion is prevented by the cooling action of the film. Even if it does adhere, the adhesion force is weakened.

In the above embodiments, the method of forming a liquid film is to expose and spray the liquid with compressed air.
Alternatively, a liquid film may be formed by causing the liquid to flow out from the pores using a pump.

[Effects of the Invention] According to the present invention, since spatter is less likely to adhere, a complicated mechanical spatter removal device is not required. In addition, even if some spatter adheres, the adhesion is weaker than before, so
This has the effect of simplifying the mechanical removal device.

[Brief explanation of drawings]

FIG. 1(a) is a configuration diagram of an embodiment of the present invention, FIG. 1(b)
2 is a partial front view of the clamp member, and FIG. 2 is a configuration diagram of the prior art. In the figure, lla to 11d: clamp member, 14: first
Base material, 15: Second base material, 16: Switching valve, 17: Liquid mixing device, 18a to 18d: Flow rate adjustment valve, 19a to 19
d: Long hole. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Patent Attorney Tadashi Sato Figure 1 11Q-11d Clan 7'-1154J14
2. 1st mountain lumber I5゛ 2nd # lumber 16: Plastic armature

Claims (2)

[Claims] (1) In an apparatus for welding base materials by clamping them with respective clamp members, welding spatter is characterized in that a film is formed by applying or spraying a liquid onto the surface of the clamp members prior to or during welding. How to prevent adhesion. (2) Welding spatter according to claim 1, wherein a long hole having a plurality of pores opening on the surface is provided in the length direction of each of the clamp members, and liquid is spouted from the pores. How to prevent adhesion.