JPS6273552A - Manufacturing bubular bulb - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a method of connecting a tube cap and a lead wire.

[Technical background of the invention and its problems]

For bulbs such as halogen-containing incandescent bulbs, the temperature of the glass bulb becomes high, so use hard glass such as quartz glass instead of pulp glass, and use silver solder to connect the lead wire leading to the cap and the eyelet of the cap. Metallic wax was used to melt the wax and raise the wax to form the contact point of the eyelet. This method of connecting the eyelet of the cap and the lead wire has the risk of corroding the metal part of the cap due to the use of flux, and when using a cap with a ceramic eyelet insulation part, the ceramic A problem arose that the product became dirty and required post-treatment such as washing with water.

[Purpose of the invention]

The present invention has been made to solve the above problems.

Since no metal solder is used and therefore no flux is used, the metal part of the cap will not be corroded by it, and even if a cap with ceramic insulation is used, the ceramic will not be contaminated, and the eyelet It is an object of the present invention to provide an improved method for manufacturing a tube, in which it is possible to easily form a contact point.

[Summary of the invention]

The present invention is a method for manufacturing a tube, characterized in that a lead wire attached to the end of a glass bulb of the tube and led out from the cap is welded to the cap by plasma arc welding.

[Embodiments of the invention]

The details of the present invention will be explained with reference to the accompanying drawings. 1st
The figure shows the base of an incandescent light bulb and a part of an arc welder attached to the end of a glass bulb of a halogen light bulb for lighting, for example.
) A lead wire (3) is inserted through the through hole of the eyelet (2) and led out. A torch portion (5) of a plasma arc welding machine (4) is arranged facing the lead wire (3). When a voltage is applied to the torch section (5), a plasma arc (6) is generated between the torch section (5), the lead wire (3), and the eyelet (2). The above arc (6
), the lead wire (3) melts and the eyelet (
2) and is formed into a chevron shape as shown in (7) in FIG. 2, and is cooled and becomes a terminal by separating the torch portion (5).

In the manufacturing method of the present invention, the lead wire led out from the eyelet of the cap is melted by plasma arc welding and adhesively molded onto the eyelet.The electrical connection between the lead wire and the eyelet is made very completely. Since this method does not involve melting the metal solder, there is no oxidation or corrosion of the metal parts of the cap such as the eyelet, and it also prevents staining due to adhesion of oxides near the welded parts, so post-treatment such as washing with water is not required. The man-hours can be reduced by
Furthermore, since plasma arc welding is used, it is possible to easily form a chevron-shaped contact point by covering the eyelet portion of the cap.

FIG. 3 is a partially cutaway front view showing an example of an apparatus for carrying out the manufacturing method of the present invention, in which a halogen light bulb (8) has its bulb aυ determined by the valve chuck α value attached to the head (9) of the apparatus. It is held and the base (1B) of the light bulb (8)
is chucked by a metal tip and a jack (131).A lead wire is led out from the eyelet (14) of the base of the light bulb (8).The eyelet I of the base C1, 2) and the lead The torch part αη of the plasma arc welding machine (1e) is placed close to the line (L!9). Axis to arm ■ (21)
It is attached to the tip (23) of the pedestal (22) which is pivoted by It is now possible to do so. Furthermore, the pedestal (22) can be adjusted on the shaft (21) in a direction perpendicular to the plane of the paper by loosening the thumbscrew (24).

Furthermore, the stage members have adjustment screws (25) and (26).
, (27) allows adjustment up and down, right and left, forward and backward by 1, and the torch part α of the arc welding machine tte is placed in a suitable position close to the eyelet I of the base Ct3 of the halogen bulb (8) and the lead wire α9. It has a structure that makes it easy to position the force.

As shown in the above example, the manufacturing method of the present invention can be easily automated and a stable welding contact can be formed using one die.

In addition, the inner diameter of the eyelet hole of the 9 caps is 1.211IL.
When the diameter of the lead wire is 0.5 mm, the through hole of the eyelet can be sufficiently closed if the length of the lead wire led out from the eyelet is 5 to 7 mm.

The attached drawing shows an example in which the arc welder is approached from below diagonally to the axis of the light bulb, but this is not limited to the example shown in one drawing. It may be directed diagonally or vertically from above, or vertically from below.

Incidentally, in the first embodiment of the present invention, the case was described in which the lead wire was welded to the eyelet of the base.

The present invention is not limited to this, but can also be applied to the case where a lead wire is connected to the shell of a cap, and if necessary, good welding can be achieved if the material on the lead wire side has a melting point or is the same as that of the material. Furthermore, although the above embodiment describes the case of brazing a halogen-containing incandescent lamp, the present invention is applicable not only to halogen incandescent lamps but also to other incandescent lamps, as well as to high-pressure discharge lamps, fluorescent lamps, etc. It may be an electric light. Furthermore, the 9 caps are not limited to screw-type caps, but can also be applied to plug-in caps or caps with pins.

〔Effect of the invention〕

The present invention is a method for manufacturing a tube, characterized in that a lead wire led out from a cap attached to the end of a glass bulb of a tube is welded to the cap by plasma arc welding. Does not use metal solder such as wax,
Therefore, corrosion of the metal part of the cap due to flux does not occur, and there is no need for liquid treatment such as cleaning, which reduces man-hours.Material costs are lower because no flux is used, and plasma arc welding allows the lead wire and cap to be connected to each other by plasma arc welding. The eyelet and connection are perfectly made.

Furthermore, since the welded part can be raised into a chevron shape, contact with equipment is improved, and the manufacturing machine can be automated, which is an excellent effect.

[Brief explanation of drawings]

Figure 1 is a partially cutaway schematic diagram of an incandescent light bulb base and an arc welding machine for explaining the manufacturing method of the present invention, and Figure 2 shows the base of an incandescent light bulb manufactured by the present invention manufacturing method. FIG. 3 is a partially cutaway front view showing an example of an apparatus for carrying out the manufacturing method of the present invention. 1.12...cap, 2,14...
...eyelet. 3.15...Lead wire. 4.16...Plasma arc welding machine. 5.17...Torch part, 6...Plasma arc.

Claims (1)

[Claims] A method for manufacturing a tube, characterized in that a lead wire led out from a cap attached to an end of a glass bulb of the tube is welded to the cap by plasma arc welding.