JP2552009Y2 - Electrode bar polishing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an electrode rod polishing machine for polishing the tip of an electrode rod for spot welding, and is mainly used for spot welding of small precision parts such as electronic equipment and decorative articles. Is used.

[0002]

2. Description of the Related Art The shape of the tip of an electrode rod in spot welding is closely related to the current density, pressure distribution, cooling effect, etc. of the welded portion, and has a great effect on work efficiency and the quality of a welded product. It is. Therefore, the tip of the electrode rod is composed of a flat surface S and an inclined surface (tapered surface) P of appropriate sizes according to the material, thickness and welding conditions of the plate material to be welded as shown in FIG.
And the outer surfaces of the flat surface S and the inclined surface P need to be finished to a highly accurate smooth surface. If the flat surface S at the tip of the electrode rod is not a smooth surface, chip marks may remain on the surface of the base material or so-called "spreading" may occur at the welded portion, and the quality of the welded product may be reduced. It will be greatly reduced.

[0003] As a method of reworking the tip of an electrode rod, a method of intensively reworking using a dedicated polishing machine and a method of reworking with a file or the like for each welding are generally adopted. However, the former method has a problem that it is not only necessary to hold a large number of replacement electrode rods, but also it is difficult to reduce the processing cost. In addition, the latter method has a problem that the working efficiency and the working accuracy are poor, and the consumption of the welding rod is large and the consumption of the welding rod is fast.

On the other hand, an electrode bar polishing machine as shown in FIGS. 7 and 8 has been developed to solve the above problems. That is, in this polishing machine, the tip of a holder B which holds the electrode rod A detachably and rotatably is supported by a support shaft C so as to be pivotable on a movable plate D in the direction of arrow (a), and The movable plate D is configured to be slidably mounted on the table E in the direction of the arrow (b) by operating the handle F. First, in the state shown in FIG.
Is pushed forward to form a flat surface S at the tip of the electrode rod A, and then, after setting the turning angle θ of the holder B, the knob B ′ is operated to move the electrode rod A while rotating. The plate D is extruded forward, and a tapered surface P is formed at the tip of the electrode rod A by a rotary polishing machine G (Japanese Utility Model Application Laid-Open No. 59-8753).

[0005]

SUMMARY OF THE INVENTION The conventional electrode bar polishing machine relatively accurately forms the tip portion into a desired shape as compared with a case where the tip portion of the electrode bar is manually machined using a grinder or a file. Can be finished. However, when the flat surface S is formed at the tip of the electrode rod A, the polishing disk G and the electrode rod A
Since the contacting portion is limited to the central portion of the polishing surface of the polishing disk G, there is a problem that local abrasion occurs on the polishing surface and the polishing surface of the polishing disk G cannot be used effectively. Further, when forming the tapered surface P, it is necessary to advance the movable plate D by operating the handle F while rotating the electrode rod A via the knob B ', which is equivalent to machining the tip of the electrode rod. There is a problem that it requires skill. Further, when the outer diameter of the electrode rod A is large, the polishing surface of the polishing disk G is not strictly flat,
There is a problem that it is practically impossible to finish the tip of the electrode rod A to a flat surface. The present invention is intended to solve the above-mentioned problem in the conventional electrode rod polishing machine, and does not require any complicated setting work for polishing. The electrode rod polisher that can automatically form a flat surface at the tip of the electrode rod by simply inserting it into the electrode rod, and effectively utilize the entire area of the polishing surface of the polishing machine. is there.

[0006]

According to the present invention, there is provided a case body 1 having an electrode rod holding guide 11 for inserting an electrode rod A in an inclined position above a side wall; A swing plate 10 whose tip is movably supported by a support pin 13; an electrode fixed downward to the tip of the swing plate 10 and having a through hole 11a through which an electrode rod A is inserted from above in the center. The basic configuration of the invention includes a rod holding guide 11 and a polishing plate 5 horizontally disposed below the electrode rod holding guide 11 and fixed to a drive shaft 3 of a motor 2 provided in the case body 1. It is. In addition, the invention according to claim 2 is a swing plate 10 in which the tip is movably supported by a pivot pin 13 to the case body 1; the swing play and the swing plate are fixed downward to the tip of the swing play 10; An electrode rod holding guide 11 having an insertion hole 11a through which the electrode rod A is inserted; and a driving shaft 3 of a motor 2 disposed horizontally below the electrode rod holding guide 11 and provided in the case body 1. The basic configuration of the invention is a polishing machine 5 having a sub-polishing surface 5b which is inclined outward of a planar main polishing surface 5a in a fixed sectional view.

[0007]

The electrode rod A is inserted into the electrode rod holding guide 11 from above, and the tip of the electrode rod A is brought into contact with the main polishing surface 5a of the rotating polishing machine 5 by its own weight. It is automatically polished into a flat shape while rotating at a low speed.
When the tip is polished flat, the electrode rod A is inserted into the electrode rod insertion guide 12 from the side of the present case, and the outer peripheral surface of the tip is brought into contact with the main polishing surface 5a of the polishing disc 5 by its own weight. The outer peripheral surface of the tip of the electrode rod is automatically polished into a tapered shape while rotating at a low speed. In the case of the polishing plate 5 provided with the sub-polishing surface 5b, the outer peripheral surface of the electrode rod is moved at a low speed by moving the swing plate 10 and bringing the outer peripheral surface of the electrode rod into contact with the auxiliary polishing surface 5b. It is automatically polished into a tapered shape while rotating.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the electrode bar polishing machine according to the present invention, and FIG.
Is a right side view, FIG. 3 is a sectional view taken along line AA of FIG. 1, FIG. 4 is a sectional view taken along line BB of FIG. 1, and FIG. 5 is a sectional view taken along line CC of FIG. In the drawing, 1 is a case body, 2 is a motor, 3 is a motor drive shaft, 4 is a polishing machine holder, 5 is a polishing machine, 6 is a polishing machine fixing screw, 7 is a dustproof cover, 8 is a bushing, 9
Is a switch, 10 is a swing plate, 10a is a handle of the swing plate, 11 is an electrode rod holding guide, 1
2 is an electrode rod insertion guide, and 13 is a support pin.

As shown in FIG. 1, the case body 1 is formed of a steel plate or a plastic material in the form of a box whose upper part is open, and its upper opening has a dustproof slot 7a which is removably inserted. It is closed by a cover 7. In addition, as shown in FIG. 2, the insertion hole 1a of the swing plate handle portion 10a is provided above the right side surface of the case body 1.
And a mounting hole 1b of the electrode rod insertion guide 12 is formed. Further, as shown in FIG. 3, a partition support plate 1c is provided horizontally inside the case main body 1, and the motor 2 is mounted on the partition support plate 1c in a vertical posture.
4 for supporting and fixing. In this embodiment, AC1
00V, 50 / 60HZ, 5700 (or 10900)
An rpm, 70 (or 150) W motor is used.

A polishing disc holder 4 is fixed to the drive shaft 3 of the motor 2 by a set screw 15. A polishing disc 5 is attached to a front end surface 4a of the polishing disc holder 4 by a left-hand polishing disc fixing screw 6. It is fixed horizontally. As the polishing disk 5, a polishing disk 5 made of so-called diamond abrasive grains is used. In the present embodiment, the polishing disk 5 made of a polishing member having a relatively fine abrasive particle size is used.

The swing plate 10 is shown in FIGS.
As shown in FIG. 2, the support 1 d is located substantially above the polishing plate 5 and is disposed vertically (ie, horizontally) with respect to the motor drive shaft 3.
It is rotatably supported by a support pin 13. At the tip of the swing plate 10, an electrode rod holding guide 11 having an electrode rod insertion hole 11 a in the center is screwed in such a state that the tip protrudes above the main polishing surface 5 a of the polishing plate 5. The electrode rod A is inserted into the insertion hole 11a from above through the long hole 7a of the dustproof cover 7. The base end (i.e., handle portion 10a) of the swing plate 10 protrudes outward through a handle portion insertion hole 1a formed in a side surface of the main body case 1. Furthermore, the electrode rod holding guide 11 is different in the inner diameter of the insertion hole 11a are several available, in the present embodiment by replacing the retaining guide 11, an outer diameter of _{1. 2mmφ~3.} It is possible to correspond to the electrode rod A of 2 mmφ.

FIG. 6 shows a case where a polishing disk 5 having a structure different from that of the above embodiment is mounted on a polishing disk holder 4. That is, in the polishing machine 5, the outer peripheral portion of the main polishing surface 5 a is slightly thickened, and the sub-polishing surface 5 b having an inclination angle of 30 to 45 degrees is formed at the step of the boundary portion. By contacting the outer peripheral surface with the sub-polishing surface 5b, the outer peripheral surface of the tip end of the electrode rod is polished in a tapered shape.

Next, the polishing of the electrode rod A according to the present invention will be described. First, by operating the handle portion 10a of the swing plate 10, the lower end surface of the electrode rod holding guide 11 is opposed to an appropriate position on the main polishing surface 5a. Next, switch 9
Is turned on, the polishing plate 5 is rotated at a high speed, and the electrode rod A is inserted into the insertion hole 11a of the electrode rod holding guide 11 from above. Thus, the tip of the electrode rod A is polished in contact with the main polishing surface 5a of the polishing disk 5, sequentially lowered by its own weight, the tip is polished automatically planar, flat担面A ₁ is It is formed. At this time, the electrode rod A inserted into the holding guide 11 is polished while rotating at a low speed due to friction of the main polishing surface 5a.

[0014] electrode rod flat担面A ₁ at the tip of A is formed, the electrode once pull the rod A from the electrode rod holding guide 11, then the distal end of the body sidewall of the electrode rod insertion guide 1
Plug into 2, the distal end portion outer peripheral surface in an inclined position by its own weight contacted to the main polishing surface 5a, to form a tapered surface A ₂ in the outer peripheral surface of the flat担面A _1. In this embodiment, the upper part of the electrode rod A inserted into the electrode rod insertion guide 12 is held by hand,
While so as to form a tapered surface A ₂ while adjusting the contact strength of the main polishing surface 5a, the electrode rod insertion guide 12
Is a hollow body having an inclination angle of a certain length dimension, the tip of which is brought into contact with the main polishing surface 5a by its own weight while holding the electrode rod A inserted therein by the insertion guide 12, and by the frictional force. the electrode rod a by low speed may be automatically formed the tapered surface a _2.

In the case of the electrode bar polishing machine of the embodiment shown in FIG. 6, first, the handle portion 10a of the swing plate 10 is operated to operate the electrode bar A inserted into the electrode rod holding guide 11.
Tip abutment Toe the the main polishing surface 5a of the board 5 of the ticket of the form 3 and as in the case flat担面A ₁ in FIG. 4. Next, the handle portion 10a of the swing plate 10 is operated to move the tip of the electrode rod A to the side of the auxiliary polishing surface 5b, and the outer peripheral surface of the electrode rod A polished in a flat shape is brought into contact with the auxiliary polishing surface 5b. It is allowed, thereby forming a tapered surface a ₂ in the outer peripheral portion of the flat担面a _1.

In each of the above-described embodiments, the handle 10a of the swing plate 10 is operated in the direction of the arrow to displace the electrode rod holding guide 11 fixed to the end thereof. It is a matter of course that the tip of the swing plate 10 may be displaced using a gear mechanism or the like by rotating (not shown).

[0017]

According to the present invention, as described above, the electrode rod A is vertically inserted into the insertion hole 11a of the electrode rod holding guide 11 from above, and the electrode rod A is inserted into the planar main polishing surface 5a of the polishing machine 5. Are vertically and self-weighted, so that the tip of the electrode rod A is automatically polished into a flat shape while rotating at a low speed, and without any complicated adjustment or skill required. The tip of the rod A can be polished flat. By changing the position of the electrode rod holding guide 11 fixed to the tip of the swing plate 10 by operating the handle portion 10a, the contact position between the electrode rod A and the main polishing surface 5a changes, and The entire area can be used effectively. Further, by inserting the electrode rod A into the electrode rod insertion guide 12 at an angle and bringing the outer peripheral surface of the electrode into contact with the main polishing surface 5a, the distal end of the electrode rod A is automatically tapered while rotating at a low speed. would be processed, it is possible to form a tapered surface a ₂ without requiring complicated adjustment or skill on the tip outer peripheral surface of the electrode rod a. in addition,
When the polishing plate 5 is configured to have the main polishing surface 5a and the inclined sub-polishing surface 5b, the tip of the electrode rod A can be held flat by simply operating the handle 10a of the swing plate 10.
Can be finished into a shape having _one and the tapered surface A _2,
Polishing efficiency is greatly improved. As described above, the present invention can automatically polish the tip of the electrode rod into a desired shape, and can also significantly reduce the size and weight of the polishing machine itself, thereby achieving extremely excellent practical utility. is there.

[Brief description of the drawings]

FIG. 1 is a plan view of an electrode bar polishing machine according to the present invention.

FIG. 2 is a right side view of the electrode bar polishing machine according to the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is a sectional view taken along the line CC of FIG. 1;

FIG. 6 is an explanatory view for polishing the tip of an electrode rod when a polishing machine having another structure is used.

FIG. 7 is a plan view of a conventional electrode bar polishing machine.

FIG. 8 is a side view of a conventional electrode bar polishing machine.

FIG. 9 is an explanatory diagram of a tip shape of an electrode rod of a spot welding machine.

[Explanation of symbols]

1 is a case body, 1a is a handle part insertion hole, 1b is a mounting hole for an electrode rod insertion guide, 1c is a partition support plate, 1d is a support, 2 is a motor, 3 is a motor drive shaft, 4 is a polishing machine holder, 5 Is a polishing plate, 5a is a main polishing surface, 5b is a sub polishing surface, 6
Is a fixing screw, 7 is a dustproof cover, 7a is a long hole, 8 is a bushing, 9 is a switch, 10 is a swing plate, 10a
The handle portion 11 is the electrode rod holding guide 11a is an insertion hole, 12 the electrode rod insertion guide, 13 pivot pin 14 is a bolt nut, 15 screw, A is the electrode rod, A ₁ is flat担面, a ₂ is a tapered surface.

Claims (2)

(57) [Scope of request for utility model registration] 1. An electrode rod (A) is tilted above a side wall.
A case having an electrode rod insertion guide (12) to be inserted inward
Scan body (1); said to case body (1) to the pivot pin (1
3) a swing plate (10) whose tip is movably supported by the swing plate (10); an insertion hole (11a) fixed downward to the tip of the swing plate (10) and for inserting the electrode rod (A) from above in the center. A perforated electrode rod holding guide (11); water is provided below the electrode rod holding guide (11).
An electrode bar polisher comprising a polisher (5) disposed flat and fixed to a drive shaft (3) of a motor (2) provided in a case body (1) . 2. A swing plate (1) having a tip end movably supported by a pivot pin (13) on a case body (1).
0) and; an electrode rod holding guide (11) fixed downward to the tip of the swing plate (10) and having a through hole (11a) through which an electrode rod (A) is inserted from above in the center.
When, wherein is disposed horizontally below the electrode rod retention guides (11), a motor provided on the case body (1) of (2) the drive shaft (3) planar at a fixed cross section in Main polishing surface
An electrode bar polishing machine comprising: a polishing machine (5) having an inclined sub-polishing surface (5b) outside of (5a) .