JPH0724939B2 - Arrestor lead spot welding equipment - Google Patents

Description

The present invention relates to an arrester lead spot welding apparatus.

(Prior Art and Problems) There is an arrester used to protect electronic equipment and the like from high voltage such as lightning surge, which has a lead in an electrode portion. FIG. 3 shows an example of an arrester provided with such a lead. In the figure, 1 is an arrester body, and 2 is an arrester electrode. Leads 3 are provided upright on the peripheral surface of each arrester electrode 2 and are provided linearly in the axial direction of the arrester.

The conventional method for fixing these leads to the arrester electrode is to join the leads to the arrester electrode by brazing or spot welding.

However, the brazing method requires a jig for brazing, and the workability such as assembling into the jig is poor, and a plurality of leads are joined to one arrester as in the above example. However, if one lead is not joined, it is difficult to regenerate it because the brazing filler metal joining other leads is melted by the heating during brazing. There is a problem.

Further, the spot welding method has a problem that the work efficiency is poor because the lead is manually welded to the arrester electrode.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide an arrester which can improve the work efficiency of joining the leads to the electrodes of the arrester and has an excellent appearance. The present invention intends to provide an ares lead spot welding apparatus that can be used.

(Means for Solving the Problems) The present invention has the following configuration in order to achieve the above object.

That is, a guide rail having a linear guide groove formed to slide the arrester in the axial direction to convey the arrester, and a slit having a width that allows the lead to pass through at the bottom of the guide groove in parallel with the guide groove, Positioning means arranged above the guide rail and positioning the arrester on the guide groove so that the arrester electrode is in the spot welding position.
A rotating arm that rotates between a lower position of the arrester positioned by the positioning means and a side lead supply position, and a lead that is vertically movable at the tip of the rotating arm and is to be welded. A lower welding electrode that accommodates the upper welding electrode that contacts the arrester electrode of the arrester positioned on the guide groove from above to provide electrical conduction for lead welding, and is disposed at a position below the guide rail. A push-up means that pushes up the lead accommodated in the lower welding electrode to contact the arrester electrode to be welded; and a lead supply mechanism that is arranged on the side of the guide rail and supplies the lead to the lower welding electrode. It is characterized by including.

(Operation) The arrester is fed along the guide groove of the guide rail,
It is positioned at a predetermined welding position on the guide groove. on the other hand,
Leads are supplied to the lower welding electrode on the rotating arm by a lead supplying mechanism, and the rotating arm rotates from the lead supplying position to a position below the guide rail and is positioned in accordance with the position of the arrester electrode to be welded. .

Then, the lead accommodated in the lower welding electrode is pushed up from below the slit provided in the guide groove so as to come into contact with the arrester electrode to be welded by the pushing-up means, and at the same time, the upper welding electrode is pushed from above the arrester electrode. When pressed and brought into contact with each other, electricity is applied between the lower welding electrode and the upper welding electrode, and the lead is spot-welded to the arrester electrode.

(Examples) Hereinafter, preferred examples of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory view showing an embodiment of an arrester lead spot welding apparatus according to the present invention.

In the figure, 10 is a guide rail for introducing an arrester, which is a component to be welded, into a predetermined position where welding is performed. This guide rail 10
Is installed almost horizontally, and a guide groove 12 is provided in a longitudinal section of the guide rail 10 in a circular arc shape having a curvature substantially the same as the peripheral side surface of the arrester.
A slit 14 is provided so as to be parallel to 12. The slit 14 penetrates vertically and is provided with a width that allows the lower welding electrode 24 to pass therethrough.

Reference numeral 16 denotes a chuck portion provided on the side of the guide rail 10, and a chuck arm extending from the chuck portion 16.
Both side surfaces of the arrester on the guide groove 12 are gripped by the 16a and 16b. The chuck portion 16 is provided with a feed screw 18 arranged parallel to the guide rail 10 on the side of the guide rail 10.
The lead screw 18 is screwed through to the stepping motor.
It is connected to 20 drive shafts.

Reference numeral 22 is a rotating arm provided on the opposite side of the chuck portion 16 with the guide rail 10 interposed therebetween. This rotating arm 22 has a shaft 22a.
It is connected to the drive unit so as to rotate horizontally about the center of the rotation arm 22, and the upper surface of the end of the rotation arm 22 is set to be below the guide rail 10.

Reference numeral 24 denotes a lower welding electrode provided at both ends of the rotating arm 22, and a lead accommodating hole 24a for accommodating a lead is provided at a central portion of the lower welding electrode 24.

Reference numeral 26 is a lead tray that stores the leads to be welded to the arrester. On the lead tray 26, the leads are arranged vertically and horizontally at regular intervals and stored. The lead tray 26 is placed on the XY stage.

Reference numeral 28 denotes a lead supply mechanism that supplies the leads on the lead tray 26 to the lower welding electrode 24 on the rotating arm 22, and includes a support portion 28a that is rotatably and vertically movable and this support portion 28a. An arm 28b extending from the. Arm 28
b is reciprocally pivoted between the lead tray 26 and the tip of the pivot arm 22 by the support 28a. A magnet for attracting and releasing the lead is provided at the tip of the arm 28b.

In FIG. 1, 29 is an upper welding electrode installed above the guide rail 10. The upper welding electrode 29 is the guide rail 10
It is provided at a corresponding position of the lower welding electrode 24 on the rotating arm 22 which is positioned at the welding position below the guide rail 10 with the pinch in between.

Next, the operation of the above-described arrester lead spot welding apparatus will be described.

The arrester 30, which is a part to be welded, is fed from one of the guide rails 10 along the guide groove 12 to the central portion of the guide rail 10 and is gripped by the chuck arms 16a and 16b. The chuck portion 16 moves back and forth on the guide rail 10 when the feed screw 18 is rotated by the stepping motor 20, and the arrester 30 can be positioned on the guide rail 10 by the pitch and the number of rotations of the feed screw 18. .

On the other hand, in the lead supply mechanism 28, the leads housed in the lead tray 26 are attracted one by one by the magnet provided at the tip of the arm 28b, and after the leads are lifted from the lead tray 26, they are placed at a position facing the lead tray 26. The rotating arm 22 is rotated to the tip portion thereof, and the lead is accommodated in the lead accommodating hole 24a of the lower welding electrode 24 on the rotating arm 22. In this embodiment, since the nail head type lead is used, the lead is hooked in the lead accommodating hole 24a by the large diameter nail head portion.

Since the lead tray 26 is placed on the XY stage, the leads stored in the lead tray 26 are sequentially attracted to the arm 28b by moving the XY stage in accordance with the lead attraction position of the arm 28b. Can be supplied.

After the lead is accommodated in the lower welding electrode 24, the rotating arm 22 rotates 180 degrees around the shaft 22a and is positioned below the guide rail 10.

FIG. 2 shows a method of welding the lead 32 to the arrester 30 on the guide groove 12. The rotating arm 22 is a guide rail 10
When it is positioned below, the lower welding electrode 24 is moved by the cylinder 34, which is a push-up means installed below the guide rail 10.
The lower surface of the
Together with 24, they pass through the slit 14 provided in the guide groove 12 and come into contact with the lower surface of the electrode of the arrester 30. At the same time, the upper welding electrode 29 descends from above the arrester 30 and
The electrode 32 contacts the upper surface of the electrode and is energized between the upper welding electrode 29 and the lower welding electrode 24, and the lead 32 is welded to the electrode of the arrester 30. The contact portion of the upper welding electrode 29 with the arrester electrode is formed into a curved surface having the same curvature as the peripheral side surface of the electrode as shown in the figure.

The arrester of this embodiment has electrodes at both ends and the center, and three leads are welded to one arrester.
Therefore, every time a lead is welded to each electrode, the chuck portion 16 is moved and positioned to weld the lead.

Since the lead welding and the lead supplying operation are performed independently, the lead is supplied to the lower welding electrode 24 at the other end of the rotating arm 22 while the lead is being welded at one end of the rotating arm 22. Each time the welding work of one lead is completed, the rotating arm 22 is rotated 180 degrees to weld the leads and supply the leads one after another to continuously perform the lead welding.

The product for which the welding of the leads has been completed passes through the slits 14 provided in the guide groove 12 and is delivered. Therefore, the slit 14 need not be provided over the entire length of the guide groove 12, and may be provided only at the discharge side portion from the welding position.

As described above, according to the lead spot welding apparatus, it is possible to automatically perform the lead welding and the lead supply, and the lead supply and the lead welding can be performed at the same time to perform efficient lead welding. For example, when one lead is welded to one arrester, the welding work can be completed in about three seconds per one arrester, and when three leads are welded to one arrester, one lead is required. Welding work can be completed in about 10 seconds.

Further, the arrester is gripped by the chuck arms 16a and 16b,
Since the positioning is accurately performed by driving the stepping motor 20, even when there are a plurality of arrester electrodes and a plurality of leads are welded to one arrester, the leads can be reliably welded by the accurate positioning.

In the above embodiment, the rotating arm 22 is formed in a shape in which the arm is linearly extended about the shaft 22a, but the shape of the rotating arm 22 is not limited to this linear shape. For example, the arm may be extended in a cross shape in the direction perpendicular to the shaft 22a, and the arm may be rotated by 90 degrees, and lead welding and lead supply may be performed in the same manner as described above.

Although the present invention has been variously described above with reference to the preferred embodiments, the present invention is not limited to these embodiments.
Of course, many modifications can be made without departing from the spirit of the invention.

(Effect of the Invention) According to the lead spot welding device for an arrester of the present invention,
The lead welding position on the arrester electrode can be accurately positioned, and accurate lead welding can be performed according to the electrode position of any arrester having one or a plurality of electrodes. Further, by using the rotating arm, lead welding and lead supply are efficiently performed, and lead welding work can be performed extremely efficiently. Further, in the present invention, since the lead is spot-welded to the arrester electrode, there is a remarkable effect such that reproduction can be easily performed when the lead is taken off.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of an arrester lead spot welding apparatus according to the present invention, FIG. 2 is an explanatory view showing a lead welding state, and FIGS. 3 (a) and 3 (b) are examples of arresters. It is a side view and a front view showing. 10 …… Guide rail, 12 …… Guide groove, 14 …… Slit, 16 …… Chuck part, 20 …… Stepping motor, 22
...... Rotary arm, 24 …… Lower welding electrode, 26 …… Lead tray, 28 …… Lead supply mechanism, 29 …… Upper welding electrode, 30 ……
Arresta, 32 ... Lead.

Claims (1)

[Claims] 1. A guide in which a linear guide groove is formed so as to slide an arrester in the axial direction to convey the arrester, and a slit is provided in parallel with the guide groove at a bottom portion of the guide groove so as to pass a lead. A rail, positioning means arranged above the guide rail and positioning the arrester on the guide groove so that the arrester electrode is located at the spot welding position, and a lower position and lateral leads of the arrester positioned by the positioning means. A rotating arm that rotates between a supply position, a lower welding electrode that is vertically movable at the tip of the rotating arm and that accommodates a lead to be welded, and an arrester positioned on the guide groove. An upper welding electrode that contacts the arrester electrode from above for electrical conduction for lead welding, and is arranged at a position below the guide rail, A push-up unit that pushes up the lead accommodated in the welding electrode to contact the arrester electrode to be welded, and a lead supply mechanism that is arranged on the side of the guide rail and supplies the lead to the lower welding electrode. This is an arrester lead spot welding device.