JPS61266186A - Light shielding method in inert gas arc welding and fixed light shielding type electrode holder and sliding light shield type electrode holder - Google Patents

Abstract

PURPOSE:To improve safety and workability by disposing a light shielding plate to enclose the upper side at the top end of an electrode so that the light and spark in the stage of welding are shut off on the electrode holder side. CONSTITUTION:The dark-colored semi-transparent light shielding plate 4 consisting of heat resistant glass is fixed to and projected from the upper half at the peripheral edge in the aperture 1 of a collet 3 of a fixed light shielding type electrode holder A. the large-sized light shielding plate 4' is further disposed as a replacement for the plate 4 on the upper side at he horizontal root end of the collet 3 if necessary. A sliding type light shielding plate is otherwise freely slidably disposed together with the plate 4 in the collet 3 and is made slidable and projectable in the stage of welding. the light and spark in the stage of welding are shut off on the electrode holder side by the above- mentioned method, by which the need for using a mask is eliminated and the safety and workability in the stage of welding are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION ``Industrial Field of Application 1 The present invention is directed to a continuous light method and method for protecting a welding tool 11 and face from strong chi 1 light and sparks generated during inert I11 gas-arc welding. This invention relates to an electrode holder with an optical function.

[Prior art] In the conventional inert gas welding process, an electrode is placed on the part of the I'J material ([l) connected to the power source (a) that is to be welded, as shown in Fig. 9. (c) (made of carbon or tungsten) is brought close to the electrode holter (d) where the Tfi pole (c) protrudes, as shown in Figure 10, to generate an arc. This is done while blowing an inert gas ('7 Fulgon or Helium lx) into the welding part through the opening (e'), but this Shiden 4t! (c) Since the tip emits strong light and sparks, welders could end up hurting their eyes or getting burns if left unchecked.

Therefore, to prevent this, dark black glass (to) [1
Wear a mask (see 1) that is fitted into the 0 part, but since it covers the entire face, it gets hot especially in the summer. ■Before welding, place the tip of the electrode (c) on the welding point of base + 4 ( 1'/ If you have to come to a W decision and have to take off the mask (1~) and check your eyes, <ffi
Therefore, it was troublesome to put in and take out the IJ every time welded.

In addition, if you wear a mask (G), you will be protected from welding (you will be protected, but you will be exposed to strong light and sparks emitted from the tip of the electrode (C), which may cause other workers working next to you to do other work). I have experienced this in various work sites, where I have suffered burns caused by other workers due to exposure to the water on my face.

[Problem to be Solved by the Invention 1] However, the present invention provides a method for inert gas-arc welding to protect the eyes and face from light and sparks without having to wear a mask each time. We offer fixed light-shielding electrode holders and sliding light-shielding electrode holders with optical functions! It's something you have to do.

[Means for Solving the Problems] The method of the present invention includes installing a light shielding plate on the electrode holder that surrounds approximately half the upper circumference of the electrode tip so that light and sparks emitted from the electrode tip during welding are directed away from the welder's face. The electrode holder side blocks light and sparks from entering the electrode.

Note that the light shielding plate may be made of dark semi-transparent heat-resistant glass, or may be made of completely opaque ceramic or heat-resistant metal.

Next, a fixed light-shielding electrode holder which is directly used in carrying out the method of the present invention will be explained.

The fixed light-shielding electrode holder of the present invention has a dark-colored, translucent light-transmitting plate fixed at an appropriate location on the electrode holder so as to half surround the upper part of the tip of the electrode.

Furthermore, a striped light-shielding electrode holder that is directly used in carrying out the method of the present invention will be explained.

The sliding light-shielding electrode holder of the present invention has an opaque light-shielding plate that protrudes during welding to half surround the upper side of the electrode tip, and when not welding, it is retracted and slides into an appropriate location on the electrode holder so that the electrode tip is exposed. It was set up freely.

"Example" An example of the fixed light-shielding electrode holder of the present invention is shown in Figure 1.
This will be explained based on FIG.

The fixed light-shielding electrode holder A of the present invention has an electrode 2 protruding from the center of the opening 1, and a dark semi-transparent semi-cylindrical light shielding plate 4 made of heat-resistant glass on the upper half periphery of the upper half of the opening 1. is fixedly protruding and surrounding the upper side of the protruding electrode 2. In the figure, 5 is an open/close button for connecting to the power source, and 6 is a connection cable for connecting to the power source.

Note that the shape of the light shielding plate 4 is not limited to that shown in the drawings; it may be fixed above the horizontal proximal end of the let 3 as shown in FIGS. 1 and 2 by a larger size 4'. good.

Next, an embodiment of the sliding light-shielding electrode holder of the present invention will be described with reference to FIGS. 3 to 7.

The sliding light-shielding electrode holder 8 of the present invention has a connection that is inserted into an axis IJ-direction movement (F) through all N through-holes 12 of 11 groups of guide branches vertically installed at several places on the upper wall surface of the electrode holder 10. An opaque semi-cylindrical light-shielding plate 14 made of metal or heat-resistant metal is fixed to the bent end of the rod 13, while a light-shielding plate 14 in the shape of an opaque semi-cylindrical piece made of a heat-resistant metal is fixed to the rear end of the connecting rod 13 as shown in FIG. ,
L-shaped base 15 fixed to the bottom inside the electrode holder 10
The longitudinal center of a swing link 18 whose lower end is connected to the other end of the connecting link 17 whose one end is connected to the fixed piece 16 which is fixed to the fixed piece 16, and whose end is pivotally connected to the rear end side of the connecting rod 13. A cam follower 24 of an eccentric cam 23 externally meshed and connected to a drive gear 22 fixed to a drive shaft 21 of a small motor 20 is freely movable in the direction of the elongated hole. The fitted rocking mechanism 25 and the structure shown in FIG. l
i. A reverse hook mechanism 30 in which a hook-shaped detent 28 is pressed and locked by the elasticity of a spring 290 is installed on the shaft 27 fixed to the rotating shaft 26 of the eccentric cam 230. 7 for small motors.
The first stage contact 43 and the third stage contact 44 of the three stage changeover switch 42 connected to the h source 41 are connected to the above)! The most of the knot 13 (
ON/OF [7
62 divine limit switch 45 common @ child 46.47
In addition, the ten contact terminal 48 and the positive contact terminal 49 of the limit switch 45 are connected to the small motor power source 41 via the small motor 20 in the middle, and the remaining second stage contact 50 is Electrode 51 and electrode power source 5
It has a built-in switching circuit 53 to which 2 is connected.

Note that the shape of the light shielding plate 14 is not limited to that shown in the drawings, but as shown in FIG. The connecting rod 131 may be fixed to the folded end of the 131-shaped surface inserted so as to be freely movable around the axis.

[Function 1] Since the present invention is constructed as described above, in the case of the fixed light-shielding electrode holder A, the light-shielding plate 4.4' is] the opening 1 of the let 3.
Since it surrounds the half circumference of the tip of the electrode 2 protruding from the top, it blocks light and sparks generated during welding from reaching the welder's face, eliminating the need to wear a mask and eliminating the need for arc welding. In this case, it is necessary to perform welding by visually checking the distance between the base material and the electrode 2 and the part where the electrode 2 is to be brought close, so the tip of the electrode 2 must be hidden from the welder's view. Fixed light-shielding electrode holder A
In this case, dark semi-transparent heat-resistant glass is used for the light-shielding plates 4, 4', so the electrode 2 can be seen through the light-shielding plates 4 and 4' and its position can be confirmed, and the light-shielding plates 4 and 4' are approximately semi-cylindrical. Since the lower side of the electrode 2 is open, there is no possibility that the light shielding plates 4, 4' will hit the base material H and become an obstacle when the electrode 2 approaches the base material.

- In the case of the sliding light-shielding electrode holder B, the operation will be explained first.The three-stage changeover switch 4
2 is switched to the first stage contact 43, at this time the positive contact terminal 48 of the limit switch 45 is in a closed state, and the small motor 20 is energized. Therefore, small motor 2
0 begins to rotate, and in response to this drive, the eccentric cam 23 rotates 9
The swinging link 18 is rotated once and the connecting rod 13, which was in the most retracted position, is moved forward.

Thereafter, when the connecting rod 133 reaches the most advanced position, the bar 45a of the limit switch 45 is pushed up by the internal spring elasticity, so the contact 48 is opened and the tangential contact 49
will switch to the closed state.

Therefore, the -C small motor 20 is disconnected from the small [-tar river power supply 41 and the voltage is stopped, and the Jζ
The connecting rod 13 is stopped and fixed at the most advanced position without moving backward.

That is, the light-shielding plate 14° 14' fixed to the tip of the connecting rod 13 protrudes so as to surround approximately half the upper circumference of the tip of the electrode 51. After that, if the three-stage changeover switch 42 is switched to the second stage connection a50, the electrode 51 and the electrode power source 52 are connected, allowing welding. Furthermore, if you switch to the third stage contact 44,
The electrode 51 is disconnected from the electrode power supply 52 and the generation of arc stops, and the contact 49 is first turned from the open state to the open state in conjunction with 1), in which the contact 48 is turned from the open state to the open state. Small motor 2 is switched to the open state.
0 is energized, this drive is reversed, and the connecting rod 13 is retracted to the most retracted position where the bar 458 of the switch 45 is pushed down to the limit 1, and the connecting rod 13 is covered with the stop 1-fixation.

That is, the light shielding plates 14 and 14', which were protruding during welding, retract when welding is completed, and the tip of the electrode 51 is exposed.

Therefore, the function of the sliding light-shielding electrode holder [3] is almost the same as that of the fixed light-shielding electrode holder A described above, but since the light-shielding plates 14 and 14' are structured to slide forward and backward, the light-shielding plates 14.14' By retracting the electrode 51, the electrode 51 can be seen directly, making it easier to confirm the position of the tip of the electrode 51, and the material of the light-shielding plate 14 and 14' is not translucent but opaque ceramic or heat-resistant metal. They differ in that they have better light-shielding properties because they can be used as

[Effects] As described above, the present invention blocks the light and sparks generated during welding from the direction of the face of the welding T on the electrode holder side. It is highly effective in protecting the welder's eyes and face from light and sparks without the need to wear a mask.

In the embodiments of the electrode holders A and I''3 of the present invention, the shape of the light shielding plates 4.4' and 14.14' is approximately semi-cylindrical, and the welding is carried out not only by the person in question but also by those next to him. J: ("), even if the welder's work is not approximately semi-cylindrical, the welder's If it is necessary to protect only m1 from light or sparks, it will cover that area.If it is of width l-J, it may be cylindrical, flat, or other shape with an arc smaller than half. It's okay.

Furthermore, the forward and backward movement control of the light shielding plate 14.1'l' and the electrode (c)
In the embodiment of the present invention, the energization control operation is performed with one opening/closing button 5 as shown in FIG. 2, but two opening/closing buttons 5' and 5'' are provided as shown in FIG. 8. When the gripping action piece 56 is slowly gripped and tightened against the plucked strip 55, the opening/closing button 5'' is first pressed, and the light shielding plate 14, 14' is advanced and the protruding electrode (c) is pressed. If the gripping action piece 56 is then gripped even more firmly, the electrode 51 will be energized and an arc will be generated to perform the welding work.If the gripping force of the gripping action piece 56 is released, the elasticity of the plucked strips 55 will be restored. Due to the force, the gripping action piece 56 is released from contact with the open/close button 5' and then 5'' in a stepwise manner, thereby cutting off the current to the electrode (c) and returning the light shielding plates 14 and 14'. Eat as it is done in order.

[Brief explanation of drawings]

Fig. 1 is a partially omitted and partially broken side view of a fixed light-shielding electrode holder A of the present invention, Fig. 2 is a front view of the fixed light-shielding electrode holder of the present invention, and Fig. 3 is a slide of the present invention. A partially omitted and partially broken side view of the light shielding type electrode holder B, FIGS. The figure is a circuit diagram of a switching circuit employed in the slide light-shielding electrode holder B of the present invention, and FIG. 7 is a partially omitted and partially broken side view showing another embodiment of the slide light-shielding electrode holder of the present invention. FIG. 8 shows another embodiment of the opening/closing button, and FIGS. 9 and 10 are explanatory diagrams of conventional inert gas arc welding and an electrode holder. A...Fixed light-shielding electrode holder B...Sliding light-shielding electrode holder 2.51...Electrode 3...Collet/1.4
' , 14.14'... Light shielding plate 5... Open/close button 6... Connection cable 10... Electrode holder 11... Guide branch 12... Through hole
13... Connecting rod 15... L-shaped base 16...
・Fixed piece 17... Connection link 18... Swing link 20... Small motor 21... Drive shaft 22
... Drive gear 23 ... Eccentric cam 24 ...
Cam disc 25... Swinging mechanism 26... Rotating shaft 27... Axle wheel 28... Rotation 1 turn 29... Spring 30... Reverse (Top mechanism 710... Common contact 41...Power supply for small motor 42...3
Stage type changeover switch 43...first stage contact 44...third stage contact 45
...Limit ~ switch 46.47... Common terminal 48... Ten contact terminal 49
...Lower contact terminal 50...Second stage contact 52...
・Electrode power supply 53...Switching circuit 54...Surrounding hole 1 to 9-

Claims (1)

[Claims] 1. The electrode holder is provided with a light-shielding plate that surrounds the upper side of the electrode tip, so that out of the light and sparks emitted from the electrode tip during welding, light and sparks directed toward the welder's face are directed to the electrode holder side. A light shielding method 2 in inert gas-arc welding in which the light shielding plate is dark-colored, semi-transparent heat-resistant glass; Light shielding method 4 in inert gas-arc welding according to claim 1, which is made of opaque ceramic or heat-resistant metal, is placed on an appropriate electrode holder so that the dark semi-transparent light shield plate surrounds about half the circumference of the tip of the electrode. The fixed light-shielding electrode holder 5 fixed at a location, the light-shielding plate being made of heat-resistant glass, and the fixed light-shielding electrode holder 6 as claimed in claim 4, wherein the light-shielding plate is approximately semi-cylindrical. Range 4th
In the fixed light-shielding electrode holder 7 described in item 1 or 5, an opaque light-shielding plate is placed at an appropriate location on the electrode holder so that it protrudes during welding and surrounds about half the upper side of the electrode tip, and when not welding, it is retracted to expose the electrode tip. The slide light-shielding electrode holder 8 is installed to be able to slide forward and backward, and the light-shielding plate is made of ceramic or a heat-resistant metal. Claim 7 which is in the form
The slide light-shielding electrode holder 10 and the light-shielding plate described in item 1 or 8 are supported in the electrode holder so as to be able to slide forward and backward, and are attached to the tip of a connecting rod having a swing mechanism and a non-return mechanism on the rear end side. Claims 7 and 8 that are fixed
Slide light-shielding electrode holder according to item 9 or item 9