JP2001150325A - Welding electrode rod polishing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly efficiently form the tip of an electrode rod into a final shape at high precision by one polishing disk and one electrode rod polishing machine and to polish the head part of the electrode rod into a mirror finished surface shape. SOLUTION: This welding electrode rod polishing machine is constituted of a body 1, a polishing motor 2, a polishing disk 3, a swing plate 4, a holder guide 6, an electrode rod holder 7, an electrode rod rotating motor 8, and a swing plate moving device 9. The shaft center ϕa of an electrode rod A is arranged along a line perpendicular to the axis ϕ of a motor driving shaft 2a, and a polishing part 3a of the polishing disk 3 is formed into a polishing shape corresponding to t final shape of the electrode rod A. The polishing disk 3 is rotated by the polishing motor 2, and simultaneously, the electrode A is rotated by the electrode rod rotating motor 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding electrode rod polishing machine for polishing the tip of a welding electrode rod of tungsten, molybdenum, chromium copper or the like used for TIG welding, plasma arc welding or the like into a predetermined shape. It is about improvement.

[0002]

2. Description of the Related Art The shape of the tip of an electrode rod in TIG welding or the like is closely related to the current density, current distribution, cooling effect, and the like of a welded portion, and greatly affects the efficiency of welding work and the quality of a welded product. Things. Therefore, the tip of the electrode rod has an appropriate shape depending on the material of the base material to be welded, the plate thickness, welding conditions, and the like, for example, the tip has a sharp conical shape, or the tip has a tapered surface and a flat surface. Finished in a two-stage cut shape (so-called frusto-conical shape). Further, the outer surface of the electrode rod tip finished in a predetermined shape is polished to a highly smooth surface. For example, the diameter D = 0.5~2.0mmφ approximately tungsten electrode rod A for TIG welding in which the distal end as shown in FIG. 9 and the head A ₁ hemispherical radius of about R = 0.08~0.1mm there, the outer surface of the hemispherical head a ₁ is polished to a smoother surface than the outer surface of the tapered portion a ₂ of the conical, that the so-called mirror-like outer surface desired.
The outer surface of the head A ₁ semispherical by a mirror-like,
This is because the generation of an arc is further facilitated and the directivity and stability of the arc are greatly improved.

Therefore, conventionally, for example, an electrode bar polishing machine having a structure as shown in FIG. 10 is used, and a polishing machine B _{1 having a} relatively coarse grain size (for example, a polishing machine of about # 170) is used.
Mounting the motor drive shaft M _1, after shaping polished tip of the electrode rod A into a predetermined shape, replacing the polishing base B ₁ fine polishing board B ₂ granularity (e.g. # 500 No. of about polishing machines), the by polishing board B ₂ the tip of the electrode rod a (referred to as a first method) method for mirror-polishing or the electrode rod grinder rough and the polishing base B ₁ mounting granularity, fine polishing plate B ₂ particle size Two electrode bar polishers are prepared, and the tip of the electrode bar A is shaped and polished into a predetermined shape by the former electrode bar polisher. Then, the tip of the electrode bar A is mirror-polished by the latter electrode bar polisher. (Referred to as a second method).

In FIG. 10, C is a case body, M
Is a polishing motor, D is a polishing machine fixing screw, E is a dustproof cover,
F is an electrode rod guide.

However, the first method has a problem that the polishing operation cannot be performed efficiently and quickly because the two types of polishing disks B ₁ and B ₂ must be replaced.
In addition, the second method requires two electrode bar polishers, which is not economical and increases the number of maintenance operations. Further, coarse when switching from polishing by the particle size of the polishing base B ₁ to polishing by the fine granularity of the polishing plate B _2, there are many possible positions of the axis of the electrode rod A is shifted, the concentricity of the so-called electrode rod A Is difficult to hold. As a result, there is a problem that not only it takes time to polish the tip portion into a mirror surface, but also that the shape of the tip portion itself changes.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the conventional grinding of the tip of a welding electrode rod, that is, in the case of replacing a coarse-grained grinding disk with a fine-grained grinding disk. Is troublesome to replace the polishing machine, it is difficult to maintain the concentricity of the electrode rods before and after the replacement of the polishing machine, and it is not economical when two polishing machines are used. Further, it is an object of the present invention to solve problems such as difficulty in maintaining concentricity of the electrode rods when using both polishing machines. It is an object of the present invention to provide a welding electrode rod polishing machine capable of efficiently and highly accurately shaping the tip of an electrode rod into a final shape and polishing and polishing the head of the electrode rod to a mirror surface.

[0007]

In order to solve the above-mentioned problems, in the electrode grinding machine for welding according to the present invention, a box-shaped main body, a polishing motor fixed in the main body, and a motor drive shaft of the polishing motor are provided. A disk-shaped polishing plate with a polishing portion mounted thereon, a swing plate disposed above the polishing plate and disposed on the main body and supported so as to be movable in the direction of the axis of the motor drive shaft, A cylindrical holder guide rotatably supported in a vertical position and having a lower portion protruding above the polishing plate in the main body, and an electrode rod which is removably inserted into the holder guide so that the tip of the electrode rod is An electrode rod holder that is detachably fixed in contact with the polishing section, an electrode rod rotation motor that is fixed in the main body and rotates a holder guide into which the electrode rod holder is inserted, and an axis of a swing plate that is a motor drive shaft Adjust movement along A swing plate moving device, wherein the axis of the electrode rod is arranged along a line perpendicular to the axis of the motor drive shaft, and the polishing part of the polishing machine is polished to a polishing shape corresponding to the final shape of the electrode rod. The basic structure of the present invention is that formed as described above.

According to a second aspect of the present invention, in the first aspect of the present invention, the polishing portion of the polishing machine includes a vertically inclined surface for shaping the tip of the electrode rod into a conical shape, and a hemispherical tip for the tip of the electrode rod. And a curved surface that is polished to a mirror-like shape.

According to a third aspect of the present invention, in the first aspect of the present invention, the swing plate is rotatably supported at one end thereof on the upper wall of the main body, and the other end of the swing plate is a shaft of the motor drive shaft. It is configured to be movable in the direction.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the electrode rod holder is provided with a cylindrical chuck guide, a collet chuck inserted into a distal end side of the chuck guide, and a base end side of the chuck guide. And a cylindrical chuck screw which is inserted and whose distal end is screwed to the collet chuck.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the holder guide on which the electrode rod holder is inserted is rotated by an electrode rod rotating motor via a round rubber belt.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the swing plate moving device includes a moving handle,
A worm gear which is rotated by the moving handle and meshes with a screw provided on the swing plate.

[0013] The invention of claim 7 is the invention of claim 1 or claim 6.
According to the invention, the moving distance of the electrode rod holder by the swing plate moving device is displayed by a dial cage having a driving body interlocked with a gauge stopper provided on the swing plate.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view of an electrode grinding machine for welding according to the present invention, FIG. 2 is a side view, FIG. 3 is a front view, FIG. 4 is a schematic vertical side view, and FIG.

The electrode bar grinder for welding according to the present invention comprises a box-shaped main body 1, a polishing motor 2 housed inside the main body 1, a polishing plate 3 rotated at a high speed by the polishing motor 2, and a front of the main body 1. A swing plate 4 disposed above the upper portion of the swing plate 4, and a cylindrical bushing 5 fixed vertically to the center of the swing plate 4.
A cylindrical holder guide 6 rotatably inserted into the bushing 5, an electrode rod holder 7 removably inserted into the holder guide 6 in a vertical position, and an electrode rod holder 7 via the holder guide 6. An electrode rod rotating motor 8 for rotating; a swing plate moving device 9 for moving a swing plate 6 supporting the electrode rod holder 7;
The polishing apparatus comprises a dial gauge 10 for displaying the amount of movement of the electrode rod holder 7 inserted into the electrode rod, an electric control device 11 for controlling the driving of the polishing motor 2 and the electrode rod rotation motor 8, and the like. Polishing amount setting gauge 12 for setting the amount
A dresser (not shown) for cleaning the polished surface of the polisher 3 is provided as an accessory to the main body 1.

The main body 1 is formed in a box shape and has a case main body 1a made of a steel plate or a plastic having an open front surface;
A transparent plastic dust cover 1b covering the front opening, and a fixing device 1 for the dust cover 1b.
c, a handle 1d, a bushing 1e, and the like. The inside of the case main body 1a is partitioned by a partition plate 1f, and a dust case 1g is removably inserted below the partition at the front part. A fixing support member 1h for each of the motors 2, 8 and the like is provided in a section at a rear portion of the case body 1a.
Is provided.

At the center of the upper wall of the front section of the case body 1a, a long hole 1i for inserting a cylindrical bushing 5 and a holder guide 6 described later is provided, and one side of the rear section is provided. Is provided with a storage hole 1j for the polishing amount setting gauge 12.

The polishing motor 2 is mounted on the support member 1h in a horizontal state, and the motor drive shaft 2a is connected to a partition plate 1f.
Through the dust case 1g on the front side of the case body 1a
It is projected to the upper part. A polishing disk holder 2b is fixed to the motor drive shaft 2a.
The polishing plate 3 is removably fixed to b by a polishing plate fixing screw 13.

The polishing motor 2 is 100 V AC, 50/6
0Hz, 100W single phase AC motor is used,
When the motor switch 14 is turned on, the motor is operated for a predetermined period of time via the electric control device 11,
After that, it is automatically stopped by a timer switch.

The polishing plate 3 has a diameter of about 6 as shown in FIG.
It is formed in a disk shape of 0 mmφ and about 8.2 mm thick
Along with the coarse particle size (for example, about # 170) and fine particles
Medium (for example, about # 500)
Grain size (for example, about # 350)
(Abrasive material), and is made of
2b is fitted to the front step portion, and is
Fixed. The polishing machine 3 grinds the tip of the electrode rod A.
The polishing section 3a for polishing is provided.
Polished shape corresponding to the final shape of the tip of the electrode rod A shown in FIG.
It is formed in a shape. That is, the polishing section 3a is a motor drive.
Angle α with respect to a line perpendicular to axis φ of dynamic shaft 2a ₁= About 10
The tip of the electrode rod A is formed into a conical shape with an inclination of °.
Vertically inclined surface 3a₁With respect to the axis φ of the motor drive shaft 2a.
Angle α_Two= Discharge polishing debris with an inclination of about 20 °
Inclined surface 3a for_TwoAnd the point of intersection of the two is radius R = approximately 0.
08 mm arc-shaped head A of electrode rod A₁A half
Curved surface 3a to be polished into a spherical mirror surface_ThreeAnd is formed from
(When the outer diameter D of the electrode rod A is 2.0 mmφ).

The swing plate 4 is provided on an upper wall in front of the case body 1a, and has one end supported by a support shaft 4a so as to be movable in the direction of the arrow in FIG. A gauge stopper 4b is provided upright on the other end of the swing plate 4, and a driving body 10a of the dial gauge 10 is provided on the gauge stopper 4b.
Is in contact. A screw 4c is formed on the other end surface of the swing plate 4, and the screw 4c is used for a worm gear 9 of a swing plate moving device 9 described later.
is engaged with b.

At the center of the swing plate 4, a bushing mounting hole 4d is formed.
A short bushing 5 for rotatably supporting the electrode rod holder 7 is inserted in d.

The upper end of the bushing 5 is fixed to the swing plate 4, and inside the bushing 5,
A short cylindrical holder guide 6 is rotatably inserted from above. That is, the holder guide 6 has a flange 6 at the upper end thereof.
In a state in which a is engaged with the upper end surface of the bushing 5, it is rotatably supported in a vertical orientation.

The holder guide 6 is for fixing the electrode rod holder 7 in a detachable manner, and has a cylindrical shape as shown in FIG. As described above, the holder guide 6 is rotatably supported by the swing plate 4 via the bushing 5 in a vertical position, and the electrode rod holder 7 is removably inserted into the holder guide 6. Fixed.

A driven pulley 6b is formed below the holder guide 6, and a rubber belt 15 is provided between the driven pulley 6b and a driving pulley 16 attached to a driving shaft 8a of the electrode rod rotating motor 8. It is wound.

The electrode rod holder 7 is for detachably holding and fixing the electrode rod A. The electrode rod holder 7 holds and fixes the electrode rod A in a state in which the tip side contacts the polishing portion 3a of the polishing plate 3.

As shown in FIG. 7, the electrode rod holder 7 includes a cylindrical chuck guide 7a removably inserted into the holder guide 6, a collet chuck 7b inserted at the distal end of the chuck guide 7a, and a chuck. A cylindrical chuck screw 7c inserted from the base end side of the guide 7a and screwed into the collet chuck 7b.
When the chuck screw 7c is tightened through the electrode rod A,
The diameter of the collet chuck 7b is reduced, and the electrode rod A is held and fixed to the collet chuck 7b.

Several types of collet chucks 7b having different inner diameters of the electrode rod insertion holes are prepared. In this example, by replacing the collet chuck 7b, an electrode rod having an outer diameter of 1.0 mm to 2.4 mm is prepared. A can be handled.

The electrode rod rotating motor 8 is disposed at a rear portion in the main body case 1a and is fixed to the support member 1h. A drive pulley 16 is fixed to the drive shaft 8a of the electrode rod rotation motor 8, and a round rubber belt 15 is wound between the drive pulley 16 and the driven pulley 6b of the holder guide 6. That is, by rotating the motor 8, the holder guide 6 is rotationally driven via the round rubber belt 15, and as a result, the electrode rod holder 7 detachably fixed to the holder guide 6 and the electrode rod A fixed to this. Is driven to rotate.

The swing plate moving device 9 is formed by a moving handle 9a, a worm gear 9b rotated by the moving handle 9a, screws 4c of the swing plate 4 meshing with the worm gear 9b, a worm gear box 9c and the like. By rotating the moving handle 9a, the swing plate 4 is moved via the worm gear 9b in the direction of the arrow in FIG. 1 around the support shaft 4a as a fulcrum. When the swing plate 4 moves in the direction of the arrow, the electrode rod holder 7 fixed to the swing plate 4
Also moves integrally, and the tip position of the electrode rod A moves in the direction of the axis φ of the motor drive shaft 2a.

The movement amount of the swing plate 4 due to the rotation of the movement handle 9a is read by the dial gauge 10. That is, when the dial gauge driving body 10a that contacts the gauge stopper 4b on the swing plate 4 moves in the direction of the arrow, the movement amount of the swing plate 4 is displayed on the dial gauge 10.
Since the configuration of the dial gauge 10 itself is known, the description thereof is omitted here.

The electric control unit 11 is for controlling the start / stop of the polishing motor 2 and the electrode rod rotating motor 8, and the like. The motors 2 and 8 are rotated at a predetermined speed.

The polishing amount setting gauge 12 is used for the electrode rod holder 7.
The polishing amount of the electrode rod A is set by adjusting the amount of protrusion of the electrode rod A held in the case, and is removably housed in the side wall of the case body 1a. As shown in FIG. 8, the polishing amount setting gauge 12 includes a cylindrical gauge body 12a, a nut 12b fixed to a tip end of the gauge body 12a, and a nut 1
The electrode rod holder 7 is inserted into the gauge main body 12a, and the tip of the electrode rod A is brought into contact with the setting bolt 12c, thereby forming the electrode rod holder. The amount of protrusion of the electrode rod A from 7 is adjusted.

When the polishing amount is set by the polishing amount setting gauge 12, first, the electrode rod A is held and fixed to the electrode rod holder 7 with the tip end protruding by a predetermined length.
Next, the electrode rod holder 7 is inserted into the holder guide 6, and trial polishing is performed by the polishing section 3a of the polishing plate 3, and it is confirmed whether or not the tip of the electrode rod A is polished to a perfect conical shape. And if the electrode rod A is completely polished,
The electrode rod chuck body 7 holding and fixing the electrode rod A is inserted into the gauge main body 12a, and the gap between the tip of the electrode rod A and the tip of the setting bolt 12c is set to a predetermined value (for example, 0.5 m).
The setting bolt 12c is moved and adjusted so as to satisfy m). The polishing amount of the electrode rod A from the next time is regulated by the gap length.

Next, the case where the electrode rod A is polished by using the electrode rod polishing machine for welding of the present invention will be described. First, a polishing machine 3 suitable for the diameter of the electrode rod A and the shape of the tip to be polished is selected and fixed to the motor drive shaft 2a. Next, the electrode rod A is inserted into the collet chuck 7b of the electrode rod holder 7, and the electrode rod A is inserted into the collet chuck 7b.
After protruding a predetermined length (45 mm to 50 mm) from the tip of, the chuck screw 7c is lightly tightened to hold the electrode rod A in a slidable state. Then, the electrode rod holder 7 holding the electrode rod A is inserted into the gauge body 12a of the polishing amount setting gauge 12, and the tip of the electrode rod A is set to the setting bolt 1
2c and pushed into the collet chuck 7b,
When the electrode rod holder 7 is completely fitted into the gauge main body 12a, the chuck screw 7c is completely tightened to fix the electrode rod A. Thus, the protrusion amount and the polishing amount of the electrode rod A are set. The position of the setting bolt 12c of the polishing amount setting gauge 12 is naturally adjusted to a predetermined position by performing the test polishing of the electrode rod A in advance, as described above.

Subsequently, the electrode rod holder 7 is inserted into the holder guide 6 and the tip of the electrode rod A is
After making contact with a, the motor switch 14 is turned on. Then, the polishing disk 3 is rotated around its axis φ by the polishing motor 2, and the electrode rod A is rotated around its axis φa by the electrode rod rotation motor 8. As a result, the tip end of the electrode rod A comes into contact with the polishing portion 3a of the polishing plate 3 while rotating, and is sequentially polished. At this time, as the polishing of the electrode rod A progresses, the electrode rod holder 7 descends in the holder guide 6 by its own weight, and as a result, the tip end of the electrode rod A becomes the vertical inclined surface 3a of the polishing plate 3. ₁
Is automatically shaped into a conical shape, and at the same time, the tip end of the electrode rod A is curved on the curved surface 3a _{3 of the} polishing machine _3. Polished to a hemispherical mirror surface. This is the axis φ of the electrode rod A.
a is arranged along a line perpendicular to the axis φ of the motor drive shaft 2a, and the polishing portion 3a of the polishing plate 3 is formed into a polishing shape corresponding to the final finished shape of the electrode rod A. This is because the electrode rod A was rotated by the electrode rod rotation motor 8 at the same time that the platen 3 was rotated by the polishing motor 2. When the electrode rod holder 7 is lowered by a certain amount, the knob of the chuck guide 7a comes into contact with the upper surface of the holder guide 6, and the lowering is restricted.

When the polishing is performed for a predetermined time, the motors 2 and 8 are automatically stopped by the timer switch, and the polishing is completed. Therefore, the electrode rod holder 7 is pulled out from the holder guide 6 and the electrode rod holder 7 is removed from the electrode rod holder 7. Remove A. That way, as shown in FIG. 9, the tip is in the tapered portion A ₂ of the conical be head A ₁ is also the outer surface natural is hemispherical obtain an electrode rod A which is mirror-finished Can be.

When polishing the electrode rods A having different outer diameters or adjusting the polishing amount of the electrode rods A, the moving handle 9a of the swing plate moving device 9 is rotated, and while watching the dial gauge 10, only a predetermined distance. The position of the center axis of the holder guide 6 is moved in the direction of the axis φ of the motor drive shaft 2 a to adjust the degree of contact between the electrode rod A and the polishing plate 3.

[0039] The polishing unit 3a of the polishing plate 3, in the previous example, the vertical inclined surface 3a ₁ and the curved surface 3 in response to the electrode rod A in FIG. 9
but it was equipped with a _3, not limited to this, for example, in the case of the electrode rod A of the tip angle of two different places consisting tapered surface called two-step conical shape, two stage in response thereto May be provided with a vertically inclined surface.

[0040]

According to the present invention, in particular, the axis of the electrode rod is arranged along a line perpendicular to the axis of the motor drive shaft, and the polishing portion of the polishing machine is adjusted to the final shape of the electrode rod. Formed in a polished shape corresponding to that, the polishing rod was rotated by the polishing motor, and at the same time the electrode rod was rotated by the electrode rod rotating motor, so that one polishing disk and one electrode rod polishing machine provided high efficiency. In addition, the tip of the electrode rod can be shaped into a final shape with high precision, and the head of the electrode rod can be polished to a mirror finish.

The polishing machine is made of an abrasive material of the same grain size (medium grain size), and the polishing portion is formed in a shape corresponding to the final shape of the electrode rod. Cost can be reduced.

Since the axis of the electrode rod is arranged along a line perpendicular to the axis of the motor drive shaft, the structure of the polishing rod is more inclined than that of a polishing machine which can be inclined with respect to the electrode rod or whose inclination angle can be adjusted. Is greatly simplified, and the cost can be reduced.

Since the electrode rod holder is moved by the swing plate moving device while looking at the dial gauge, the position of the electrode rod with respect to the polishing plate can be adjusted extremely accurately.

Since the round rubber belt is used for transmitting the rotational driving force of the electrode rod, the movement by the swing plate moving device is well absorbed by the expansion and contraction. As a result, the electrode rod holder is smoothly driven to rotate.

[Brief description of the drawings]

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

FIG. 2 is a side view of the electrode bar polishing machine for welding.

FIG. 3 is a front view of a polishing machine for an electrode rod for welding.

FIG. 4 is a longitudinal sectional side view showing a main part of a welding electrode bar polishing machine.

FIG. 5 is a vertical sectional front view showing a main part of the electrode bar grinder for welding.

FIG. 6 is a sectional view of a polishing machine.

FIG. 7 is a sectional view of the electrode rod chuck body.

FIG. 8 is an explanatory diagram of an electrode polishing amount setting gauge.

FIG. 9 shows an example of the shape of the tip of a tungsten electrode rod for TIG welding.

FIG. 10 shows an example of a conventional electrode bar polishing machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body, 1a ... Case main body, 1b ... Dustproof cover, 1c
... Fixing tool, 1d ... Handle, 1e ... Bushing, 1f ... Partition plate, 1g ... Dust case, 1h ... Support member, 1i ... Long hole, 1j ... Storage hole, 2 ... Polishing motor, 2a ... Drive shaft, 2
b: polishing machine holder, 3: polishing machine, 3a: polishing part, 3a ₁
... vertical inclined surfaces, 3a ₂ ... lateral inclined surfaces, 3a ₃ ... curved, the swing plate 4, 4a ... support shaft, 4b ... gauge stopper 4
c: screw, 4d: bushing mounting hole, 5: bushing,
6 holder guide, 6a flange, 6b driven pulley, 7
... Electrode rod holder, 7a ... Chuck guide, 7b ... Collet chuck, 7c ... Chuck screw, 8 ... Electrode rotation motor, 8a ... Drive shaft, 9 ... Swing plate moving device, 9
a: moving handle, 9b: worm gear, 9c: worm gear box, 10: dial gauge, 10a: driving body, 11: electric control device, 12: polishing amount setting gauge,
12a: Gauge body, 12b: Nut, 12c: Set bolt, 13: Polishing machine fixing screw, 14: Motor switch, 15: Round rubber belt, 16: Drive pulley, A: Electrode rod, φ: Motor drive shaft Core, φa: electrode rod axis,
A ₁ : the tip of the electrode rod; A ₂ : the tapered portion of the electrode rod.

Continued on the front page. (72) Inventor Akihisa Murata 4-6-11, Kigawahigashi, Yodogawa-ku, Osaka-shi, Osaka Inside Murata-Senken Co., Ltd. (72) Inventor Shinichi Ikeda 2-3-2, Noribori, Nishi-ku, Osaka-shi, Osaka No. Fujikin Co., Ltd. (72) Inventor Akihiro Morimoto 2-3-2, Noribori, Nishi-ku, Osaka, Osaka Fujikin Co., Ltd. (72) Katsunori Yoneka 2-3-2, Noribori, Nishi-ku, Osaka, Osaka In Fujikin (72) Inventor Akio Motoi 2-3-2, Nobori, Nishi-ku, Osaka-shi, Osaka Fujikin Incorporated F-term (reference) 3C049 AA03 AB04 BA07 CA01 CB01 4E001 LH05 LH09

Claims (7)

[Claims] 1. A box-shaped main body, a polishing motor fixed in the main body, a disk-shaped polishing disk attached to a motor drive shaft of the polishing motor and provided with a polishing portion, and a disk-shaped polishing disk positioned above the polishing disk. A swing plate disposed on the main body and supported so as to be movable in the direction of the axis of the motor drive shaft; and a lower portion protruding above the polishing plate in the main body, rotatably supported by the swing plate in a vertical orientation. A cylindrical holder guide, an electrode rod holder which is removably inserted into the holder guide, and which detachably fixes the electrode rod in a state where the tip of the electrode rod contacts the polishing portion of the polishing machine; An electrode rod rotation motor that rotates a holder guide with an electrode rod holder inserted therein, and a swing plate moving device that adjusts and moves a swing plate along the axis of the motor drive shaft. Drive shaft An electrode rod polishing machine for welding, wherein a polishing portion of a polishing machine is formed in a polishing shape corresponding to a final shape of an electrode rod, while being arranged along a line perpendicular to an axis of the electrode. 2. A polishing machine comprising: a polishing section of a polishing machine having a vertically inclined surface for shaping the tip of an electrode rod into a conical shape, and a curved surface for polishing a head of the electrode rod into a hemispherical mirror surface. The electrode bar polishing machine for welding according to claim 1. 3. The swing plate according to claim 1, wherein one end of the swing plate is rotatably supported on the upper wall of the main body, and the other end is movable in the direction of the axis of the motor drive shaft. Polishing machine for electrode rod for welding. 4. A cylindrical chuck guide, a collet chuck inserted into the distal end of the chuck guide, and a cylinder inserted from the proximal end of the chuck guide and screwed into the collet chuck at the distal end. The electrode bar grinder for welding according to claim 1, comprising a chuck screw having a shape of a circle. 5. The polishing machine according to claim 1, wherein the holder guide on which the electrode rod holder is inserted is rotated by an electrode rod rotation motor via a round rubber belt. 6. The polishing machine according to claim 1, wherein the swing plate moving device comprises a moving handle, and a worm gear rotated by the moving handle to mesh with a screw provided on the swing plate. 7. A dial cage provided with a driving body interlocking with a gauge stopper provided on a swing plate, wherein a moving distance of the electrode rod holder by the swing plate moving device is displayed. Electrode rod polishing machine for welding.