JPH0233989Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is mainly used in stud welding using a welding gun, and is an aid for horizontal stud welding to prevent molten metal from dripping when welding vertical walls etc. It's about the ingredients.

(Prior Art) Conventionally, as shown in FIGS. 1 and 2, an arc shield member has a plurality of approximately semicircular ventilation slots 2 attached to the tip of an arc shield grip 1. When the stud 4 is loosely fitted into the arc shield member 3 and the stud 4 is welded to, for example, a vertical wall surface 6 or an inclined wall surface as the base material 5, the molten metal 7 flows from the ventilation slot 2 of the arc shield member 3 into a teardrop shape 8. It had some drawbacks.

This problem becomes more pronounced as the diameter of the stud 4 increases, and there is also the drawback that horizontal stud welding is difficult to perform.

(Technical Problem) The present invention was developed in view of the shortcomings of the prior art, and it is a technical problem to prevent molten metal from dripping even when welding studs sideways or diagonally. This is a subject to be addressed.

(Technical Means) In order to solve the above-mentioned technical problem, the present invention has a substantially semi-circular sagging prevention device integrally or detachably attached to the arc shield member.

Specifically, as shown in the embodiments of FIGS. 3 and 4, the configuration is as follows.

Reference numeral 10 denotes an annular arc shield member having a plurality of substantially semicircular ventilation slots 11 at its tip.

12 is an arc shield grip connected to the arc shield member 10.

Reference numeral 13 is a sag prevention tool made of metal, heat-resistant synthetic resin, or the like formed into a substantially semicircular shape, and is attached to the arc shield member 10 and detachably attached to the arc shield grip 12 with screws 14 or the like.

Alternatively, the screws 14 and the like may be omitted and the parts may be fixed integrally.

In order to prevent dripping of molten metal eluted from the ventilation slot 11 on the lower side of the arc shield member 10 during arc welding of the stud S, the drip prevention tool 13 is installed about the lower half so as to close the ventilation slot 11. It is positioned and attached so as to cover the outside of the arc shield member 10.

(effect) The above technical means works as follows.

When the stud S is arc welded by pressing the droop prevention device 13 against the vertical or diagonal wall surface of the base material of the arc shield member 10, the molten metal will elute downward, but the lower ventilation slot 11 Since it is covered by the drip prevention device 13, it will not drip. In this way, good welding is achieved.

(Effects) Since the present invention has the structure and operation described above, it has the following effects.

Since the approximately semi-annular sagging prevention device 13 is attached to the lower side of the arc shield member 10, the plurality of ventilation slots 11 in approximately the upper half of the arc shield member 10 are opened, and the arc shield member 1
0 rotary positioning allows all ventilation slots 11
Since the plurality of ventilation slots 11 in the upper half are always open, gas venting is carried out well, and molten metal is prevented from being blocked, especially during lateral welding of large diameter studs. It is possible to prevent dripping or dripping, and it is possible to perform good welding, and the high-temperature gas jet due to the generation of arc is
1, and the arc flow is also concentrated only in the upper half circumferential direction corresponding to the ventilation slots 11 in the upper half, so an effective arc blow phenomenon can be performed, and the stud There is an effect that the excess build-up surrounding the entire circumference can be formed evenly and substantially symmetrically over the upper half and the lower half.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of the prior art, in which FIG. 1 is a longitudinal sectional side view of the device in use, and FIG. 2 is a perspective view of the arc shield member. Figures 3 and 4 show an embodiment of the present invention, Figure 3 is a perspective view of the sag prevention device attached to the arc shield member, and Figure 4 also shows its use. FIG. 10: Arc shield member, 11: Ventilation slot,
13: Anti-sagging tool.

Claims (1)

[Scope of utility model registration request] An auxiliary tool for horizontal stud welding, in which a substantially semi-annular sag prevention tool 13 is positioned so as to close approximately half of the lower ventilation slots 11 of an annular arc shield member 10 having a plurality of ventilation slots 11. .