JPH11254179A - Polishing machine for welding electrode - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polishing machine that can form a superior welding electrode without skill at all by automatically polishing an electrode rod only by setting it. SOLUTION: This machine is provided with a grinding wheel rotating mechanism, an electrode rod holding mechanism 7 which rotatably holds an electrode rod 19 so that it comes into contact with the grinding wheel 1 obliquely at the tip end and which is attached in the manner that the tip end of the electrode rod 19 can rotate in the direction approaching and receding from the grinding wheel, a pressing means 20 for pressing the electrode rod holding mechanism 7 so that the tip end of the rod 19 held by it is rotated in the direction coming into contact with the grinding wheel 1, and a stopper 24 which variably regulates a prescribed rotating quantity of the electrode rod holding mechanism 7 in the direction of the contact with the tip end of the rod.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding electrode polishing machine for polishing a tip of an electrode rod in a conical shape with a grindstone portion formed on a side peripheral portion of a polishing wheel. The present invention relates to a welding electrode polishing machine having a cutting function for cutting into lengths.

[0002]

2. Description of the Related Art Welding requires a welding electrode. Generally, a tungsten rod is cut into an appropriate length, and one end of which is polished in a conical shape is used as a welding electrode. Such a welding electrode is consumed during welding, and it becomes difficult to perform a good welding as the degree of consumption increases. Therefore, when the wear progresses to a certain stage, it is necessary to replace it with a new welding electrode, and the more frequently a better welding is required, the more frequently the welding electrode is replaced.

[0003] By the way, conventionally, the preparation of a welding electrode,
Specifically, polishing of the tip of the tungsten rod into a conical shape was usually performed manually by a technician. That is,
The technician holds the tungsten rod in his hand, tilts it obliquely to the side of the rotating diamond wheel, touches the tip of the tungsten rod on the side edge, and slowly rotates the tungsten rod by hand to remove the edge of the tip. The cutting was performed diagonally, and the shaving amount was gradually increased to make a conical shape with a sharp tip.

To cut a tungsten rod into a predetermined length, the tungsten rod is gripped on both sides of the portion to be cut at a position separated from the portion, and the portion to be cut is pressed by a rotating cutting wheel. This was usually done by scraping until it was completely cut.

[0005]

The polishing of a tungsten rod by hand requires a high degree of skill and cannot be easily performed by anyone. The tip of the welding electrode must have a clean cone, but grinding to have a clean cone requires years of experience, and for beginners, the tungsten rod tip should have a clean cone. It is impossible to finish. In particular, the balance between the speed of polishing and the speed of turning the tungsten rod is important, and if it is not done well, a clean conical shape will not be obtained, but this is considerably difficult.

Furthermore, the welding electrode also needs to be accurate in the angle (vertical angle) of the welding cone, and if the angle is bad, good welding is impossible. Therefore, it is also difficult to make the cone angle as specified. As described above, the problem that a good welding electrode cannot be produced without a skilled technician is a factor that hinders labor saving and effective utilization of human resources, and a factor that hinders improvement in productivity.

[0007] Also, cutting of the tungsten rod does not necessarily require a high level of skill, but if the gripping force is weak, the tungsten rod may blow off and cause unexpected injury.
Don't let your guard down. There is also a problem that if left to a beginner, it is not possible to finish the length as measured.

The present invention has been made to solve such a problem, and the electrode rod is automatically polished as long as the electrode rod is set, so that a good welding electrode requires no skill. It is another object of the present invention to provide a welding electrode polishing machine that can be formed without any problem, and furthermore, it is possible to satisfactorily cut with a rotating cutting wheel without holding the electrode rod by hand. It is another object of the present invention to provide a welding electrode polishing machine having an electrode rod cutting function capable of making an accurate length without requiring skill.

[0009]

According to a first aspect of the present invention, there is provided a welding electrode polishing machine, comprising: a polishing wheel rotating mechanism; and an electrode rod rotatably held so as to be in contact with the polishing wheel at an end in an oblique direction. An electrode rod holding mechanism rotatably mounted in a direction in which a rod tip contacts and separates from the polishing wheel, and a tip of the electrode rod holding the electrode rod holding mechanism is rotated in a direction in contact with the polishing wheel. The present invention is characterized in that it has a biasing means for biasing, and a stopper which is variable in a prescribed rotation amount for regulating the rotation of the electrode rod holding mechanism in a direction in which the tip of the electrode rod contacts.

Therefore, according to the welding electrode polishing machine of the first aspect, the electrode rod is rotatably held by the electrode rod holding mechanism, and the tip of the electrode rod comes into contact with the grinding wheel portion of the polishing wheel rotated by the polishing wheel rotating mechanism. When the orientation is set, the electrode rod holding mechanism is brought into a state in which the tip of the electrode rod is pressed against the polishing wheel by the urging force by the urging means, and this state is maintained. Therefore, the electrode rod rotates with the rotation of the polishing wheel while polishing the edge of the tip end surface. Of course, if the holding of the electrode rod has complete play, the electrode rod rotates very fast and is hardly polished, but if rotation is allowed but there is some resistance to rotation, the electrode rod rotates while being polished. I do.
Therefore, the shaving amount of the edge of the tip of the electrode rod gradually increases, and the shape becomes a truncated cone. If the stopper is adjusted in advance so as to prevent further rotation of the electrode rod holding mechanism when the angle of the cone reaches the desired angle, further polishing is performed when the cone reaches the desired angle. Will not progress. At that time, a completed welding electrode can be obtained by rotating the electrode rod holding mechanism in a direction in which the tip of the electrode rod is separated from the polishing wheel and removing the electrode rod from the electrode rod holding mechanism. Therefore, a satisfactory welding electrode can be obtained by simply setting the electrode rod or removing the electrode rod after polishing without any skill. Incidentally, the cone angle at the tip of the electrode rod can be adjusted by a specified value of the amount of rotation of the electrode rod holding mechanism toward the polishing wheel by a stopper, and this does not require any special skill.

According to a second aspect of the present invention, there is provided a welding electrode polishing machine according to the first aspect, wherein the moving element moves forward to polish the electrode rod holding mechanism against the urging force of the urging means. It is characterized in that it has a direction drive mechanism for rotating in a direction away from the wheel or conversely, allowing the tip of the electrode rod of the electrode rod holding mechanism to rotate in a direction in contact with the polishing wheel.

Therefore, according to the welding electrode polishing machine of the second aspect, by moving the moving member of the direction driving mechanism forward and rotating the electrode rod holding mechanism in a direction away from the polishing wheel, the electrode rod can be brought into contact with the polishing wheel. The electrode rod can be set in the electrode rod holding mechanism in a safe state where there is no risk of contact. Then, after setting, the moving element is retracted to allow the urging by the urging means of the electrode rod holding mechanism, and further, the polishing of the electrode rod is permitted until it is stopped by the stopper. Done without. afterwards,
When the moving element is advanced, the electrode rod holding mechanism can be rotated in a direction away from the polishing wheel, and a safe state can be achieved without the electrode rod coming into contact with the polishing wheel. Therefore, removal of the electrode rod from the electrode rod holding mechanism can be performed safely and smoothly. Therefore, the operation of the welding electrode polishing machine can be performed extremely safely. Therefore, even beginners can safely make welding electrodes.

According to a third aspect of the present invention, there is provided a welding electrode polishing machine according to the first or second aspect, wherein a cutting wheel rotating mechanism for rotating the cutting wheel by a motor for rotating the polishing wheel, and a peripheral portion of the cutting wheel. A pair of holding pieces are opposed to each other with the wheel entry groove inserted therein, and an electrode rod insertion hole for passing an electrode rod to be cut is formed at a position opposite to the holding piece, and one of the holding pieces is provided with the other holding piece. An electrode rod holding mechanism in which a stopper piece for stopping the tip of the electrode rod to be cut loosely inserted into the electrode rod insertion hole of the one holding piece from the electrode rod free insertion hole is mounted so as to be variable in position. The electrode rod holding mechanism is rotatable so that the cutting wheel can be cut into the above-mentioned wheel intrusion groove and the electrode rod to be cut loosely inserted into the electrode rod insertion hole can be cut. A rotation holding mechanism attached to the Characterized in that it has at least.

Therefore, according to the welding electrode polishing machine of the third aspect, the tip of the electrode rod to be cut into the free insertion hole of the holding piece of the holding mechanism of the electrode rod to be cut is stopped against the stopper piece from the side opposite to the stopper. When it is inserted until it is completed, a portion having a length from the tip corresponding to the position of the stopper piece is located between the pair of holding pieces. When the cutting electrode rod holding mechanism is rotated, the portion between the holding pieces, that is, the peripheral portion of the cutting wheel relatively enters into the wheel intrusion groove, and is held between the holding pieces of the cutting electrode rod by the cutting wheel. The located part is cut off. At this time, since the electrode rod is held on both sides of the cut portion by the holding pieces, it is not always necessary for the operator to hold the electrode rod. It is only necessary to simply rotate the electrode rod holding mechanism to be cut. Then, when the cutting is completed, the electrode rod holding mechanism to be cut may be rotated in the original direction, and even after the cutting is completed, the portions on both sides of the cut portion are held by the pair of holding pieces, so that the cutting is performed. There is no fear that the electrode rod blows away. Therefore, even a beginner can perform the cutting operation extremely safely. The cutting position can be precisely controlled by the position of the stopper piece, and the electrode rod can be accurately cut to a predetermined length without any skill.

Then, polishing and cutting can be performed with one polishing machine, and there is no need to purchase a special cutting machine. In addition, since the rotation of the polishing wheel and the rotation of the cutting wheel are performed by one motor, it is not necessary to separately provide a motor for the polishing wheel and a motor for the cutting wheel.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to illustrated embodiments. FIGS. 1 and 2 show a polishing part which is a main part of one embodiment of a welding electrode polishing machine of the present invention. FIG. 1 is a perspective view, and FIG. 2 is a longitudinal sectional view of an electrode rod holding mechanism. .

Reference numeral 1 denotes a polishing wheel rotated by a motor (not shown), which is composed of a diamond wheel, and has a polishing portion 1a using diamond on a peripheral portion on one side surface. Reference numeral 2 denotes a cover on the main body side, which is open at a position necessary for polishing the polishing wheel 1, but covers the polishing wheel 1 at other portions. Reference numeral 3 denotes a polishing section mounting plate, which is mounted on the cover 2. The part attached to the cover 2 does not appear in the drawing. The polishing section mounting plate 32 has a horizontally long mounting long hole near a central portion that does not appear in the drawing,
Further, a support shaft escape notch 5 is provided at the rear left portion (the left portion in FIG. 1). The polishing part mounting plate 3 is provided with a cover 2
In addition, the portion slightly closer to the polishing wheel than the horizontal direction is inclined upward. This inclination is the angle θ ₁ shown in FIG. The reason for providing such an inclination will be described later with reference to FIG.

Reference numeral 4 denotes an inverted L-shaped mounting bracket when viewed from behind.
Has a mounting screw hole near the center that does not appear in the drawing,
The rear left portion (the left portion in FIG. 1) has a mounting hole 6 for mounting the electrode rod holding mechanism. The mounting bracket 4 is mounted on the surface of the polishing section mounting plate 3. Specifically, a mounting screw that does not appear in the drawing is passed through the mounting long hole (not appearing in the drawing) of the polishing part mounting plate 3 from below,
The mounting screw is mounted by screwing a tip end of the mounting screw into a mounting screw hole (not shown in the drawing) of the mounting bracket 4. Therefore, the mounting position of the mounting bracket 4 can be changed along the longitudinal direction (the horizontal direction) of the mounting long hole. Also, the direction can be changed.

Reference numeral 7 denotes an electrode rod holding mechanism mounted on the mounting bracket 4, which is rotatably mounted on the mounting hole 6 by a mounting screw 6a inserted from below. The mounting screw 6a forms a support shaft, and the electrode rod holding mechanism 7 is rotatable about the support shaft. The internal structure of the electrode rod holding mechanism 7 is shown in FIG. Reference numeral 8 denotes a block forming the outer casing, which has a mounting hole 9 that penetrates in the front and rear direction, and has a threaded hole 10 that reaches the mounting hole 9 from the outer surface of the block. An outer holder 11 is fitted into the mounting hole 9 from behind, and the outer holder 11 is screwed into the screw hole 10 by a screw 12.
Is fixed.

The outer holder 11 has an inner holder mounting hole 13 formed at the center thereof so as to penetrate the outer holder 11 back and forth. The inner holder mounting hole 13 has a smaller diameter in the front half, a larger diameter in the rear, and a thread groove in the rear end. Reference numeral 14 denotes a cylindrical electrode rod holding holder, which is fitted into the holder mounting hole 13 from behind, and a rear flange-shaped portion is formed at a central step portion of the inner holder mounting hole 13 (a front small-diameter portion and a small-diameter portion). The holder 14 is prevented from moving in the forward direction by being engaged with the rearward step formed by the larger diameter portion at the rear. Reference numeral 15 denotes a rear holder, which is mounted behind the electrode holding holder 14 in the holder mounting hole 13. Specifically, a screw groove is formed on the outer peripheral surface of the rear holder 15, and the screw groove is attached by screwing the screw groove into the screw groove of the inner holder mounting hole 13, and
The rear holder 15 allows the electrode rod holding holder 14 to be used.
Press from behind to prevent this retreat.

The rear holder 15 has a cylindrical shape, and includes a rod-shaped stopper 1 for preventing the electrode rod described later from being retracted.
6 are fitted. Reference numeral 17 denotes a screw hole formed in the meat portion of the rear holder 15 so as to penetrate the same, and reference numeral 18 denotes a screw screwed to the screw hole. The rod-shaped stopper 16 is fixed by the screw 18.

Reference numeral 19 denotes an electrode rod which is polished to be a welding electrode and is made of, for example, tungsten. The electrode rod 19 is inserted into the electrode rod holding holder 14 from the front side, and the rod-shaped stopper 16 is formed.
In this case, further rearward movement is prevented. The inner diameter of the electrode rod holding holder 14 is slightly larger than the diameter of the electrode rod 19 to be polished.
9 is designed to be rotatable. If the electrode rod 19 is completely rotatable, the electrode rod 19 rotates completely in accordance with the rotation of the polishing wheel 1 during polishing, and there is a possibility that the electrode rod 19 is hardly polished. The relationship between the outer diameter of the electrode 19 and the inner diameter of the electrode rod holding holder 14 is set. Specifically, it is sufficient that there is a difference in diameter of about 1 to 2 mm. Since the electrode rod 19 has several kinds of diameters, several kinds of the electrode rod holding holders 14 having different diameters are prepared corresponding to the kind of the diameter, and are used after being exchanged. .

Reference numeral 20 denotes a spring adjusted between the vertical piece of the L-shaped mounting bracket 4 and the block 8, and corresponds to a biasing means in the claims. One end is locked in the hole of the protruding piece 21 on the block 8 side, and the other end is attached to a screw 22 of a vertical piece of the mounting bracket 4. This spring force is applied to the block 8 using the screw 6 a as a fulcrum. It acts so as to rotate in a direction approaching the polishing wheel 1. Reference numeral 23 denotes a groove formed in a vertical piece of the mounting bracket 4, and a screw groove is formed at a position corresponding to each other on both sides thereof, and a stopper screw 24 is screwed into the screw groove.
4 has a knob 25 fixed to a portion located in the groove 23 so that the stopper screw 24 can be turned.

Reference numeral 26 denotes a drive screw 26 which forms a moving element of the direction drive mechanism in the claims, and is screwed into a screw hole formed in the vertical piece of the L-shaped mounting bracket 4 so as to pass therethrough. When the block 8 is advanced, the block 8 can be rotated by pushing the side surface of the block 8 in a direction in which the electrode rod 19 moves away from the polishing wheel 1 against the spring force of the spring 20. The electrode rod 19 of the block 8 allows the polishing wheel 1 to rotate in the direction.

Next, a polishing method using a polishing section is used.
First, the knob of the drive screw 26 is turned and advanced to rotate the block 8 in a direction in which the tip side is separated from the polishing wheel 1, and in this state the electrode rod 1 to be polished is
9 is inserted into the electrode rod holding holder 14 from the front side. Then, the electrode rod 19 stops at the position where it comes into contact with the rod-shaped stopper 16, and further retreat is prevented. Then, drive screw 2
6 is retracted by turning its knob. Then, the block 6 causes the electrode rod 1 to move due to the spring force of the spring 20.
9 rotates in a direction approaching the polishing wheel 1, and the tip of the electrode rod 19 hits the grinding wheel portion 1 a of the polishing wheel 1. Nevertheless, the drive screw 26 is further retracted so as not to hinder the polishing. Specifically, the block 8 is retracted to a position where it does not prevent the block 8 from rotating to a position where the block 8 contacts the stopper screw 24.

By the way, as described above, the tip of the electrode rod 19 comes into contact with the grinding wheel portion 1a of the polishing wheel 1, and the force at that time is obtained by the spring 20. The tip of the electrode rod 19 is polished by the polishing wheel 1, and the electrode rod 19 rotates by receiving the rotational force of the polishing wheel 1. In this regard, FIGS. 3 (A) and 4 (A)-
The description by (C) will be given later.

The electrode rod 19 which turns while its tip is being polished has a truncated conical shape at the beginning, and then becomes completely conical as polishing progresses. When this complete conical shape is reached, the block 8 strikes a stopper screw 24 whose position has been adjusted to prevent further rotation. Therefore, no further polishing proceeds. The state at that time is shown in FIG.
It is shown in (B). When the cone angle is set to a certain angle, the angle of the electrode rod 19 with respect to the side surface of the polishing wheel 1 is an angle θ ₂ corresponding to a half of the cone angle. At this time, it is necessary to set up in advance so that the block 8 comes into contact with the stopper screw 24 that prevents the rotation.

After the polishing is completed, the block 8 is rotated so that the driving screw 26 corresponding to the moving element is moved forward to rotate the block 8 in a direction in which the tip of the electrode rod 19 is separated from the polishing wheel 1, and the electrode rod 19 is taken out. This is one electrode rod 1
This means that the polishing operation for No. 9 has been completed.

FIGS. 3A and 3B are views showing the angle of the electrode rod 19 with respect to the polishing wheel 1 during polishing.
(A) is viewed from the side, and (B) is viewed from above. First, as shown in FIG. 3 (A), the electrode rod 19 is inclined so as to form θ ₁ with respect to the horizontal direction and move upward as it goes further. There is a reason for this, and FIGS. 4A to 4C are for explaining the reason. The most essential point of the welding electrode polishing machine of the present invention is that when the electrode rod 19 is polished, it is necessary to grind the electrode rod 19 while rotating the electrode rod 19, and the turning is performed by using the rotation of the polishing wheel 1. It is in. The most effective use of this is when the electrode rod 19 is directed in the centripetal direction of the polishing wheel 1 as shown in FIG. However, if you do this,
The electrode rod 19 is added to the polished portion of the electrode rod 19 by the whetstone portion 1a.
A fine stripe pattern perpendicular to the axis is formed.

However, according to the electrode rod 19 having the stripe pattern in such a direction, it seems that a good welding arc is not always generated at the time of welding. Empirically, it is best if the direction of the stripe pattern is the same as the direction of the axis of the electrode rod 19. However, in order to do this, as shown in FIG.
9 and must be polished. Then, the electrode bar 19 cannot be rotated by the rotation of the polishing wheel 1. This makes it impossible to implement the present invention.

Therefore, as shown in FIG.
The direction of the stripe pattern formed by polishing by making the direction of 9 oblique to the tangential direction is oblique to the axis of the electrode rod 19. By doing so, FIG.
Although the welding arc is not better than in the case shown in
However, the required goodness is obtained, yet the rotation of the polishing wheel 1 is sufficiently available to rotate the electrode rod 19 and the invention can be implemented. Then, the oblique angle corresponds to θ ₁ in FIG. The reason why the above-mentioned polishing section mounting plate 3 is inclined by θ ₁ is as follows.

FIG. 5 is a perspective view showing a polishing section of one embodiment of the welding electrode polishing machine of the present invention. A cutting wheel 31 has a grindstone formed on the outer peripheral surface thereof. The cutting wheel 31 is rotated by a motor (not shown) for rotating the polishing wheel 1. Specifically, a motor having a rotating shaft protruding on both sides is used as a motor, and a polishing wheel 1 is attached to one protruding end of the rotating shaft.
And the cutting wheel 31 is attached to the other protruding end. A cover 32 covers most of the cutting wheel 31.

Reference numeral 33 denotes a cutting portion mounting plate for rotatably supporting the electrode rod holding mechanism 34 attached to the cover 32. The cutting portion mounting plate 33 is attached to the cover 32 by screws 35, 35. Reference numeral 36 denotes an electrode rod to be cut. This is a support shaft that rotatably supports the holding mechanism 34. In addition, the cutting mechanism mounting plate 3 of the cover 32
The part to which 3 is attached is notched for convenience.

Reference numeral 37 denotes an electrode rod holder which forms the main body of the electrode rod holding mechanism 34 to be cut, has a U-shape as viewed from above, and has a wheel entry groove 39 between the pair of holding pieces 38, 38. A handle 40 is formed on one side surface of the electrode rod holder 37 so as to protrude. Then, by gripping the handle 40 and pushing forward, the electrode rod holder 37 is cut off by the cutting wheel 3.
When rotated to the first side, the cutting wheel 31 relatively enters the wheel entry groove 39 in a non-contact manner. However, the bottom surface of the wheel entry groove 39 is formed by the cutting wheel 3.
A stopper 41 is attached to the electrode rod holding plate 33 so as not to rotate until it comes into contact with 1, and one of the holding pieces 38 hits the stopper 41 so that further rotation is prevented. 42a, 42a, 42b,
Reference numerals 42b, 42c, 42c, 42d, and 42d denote four pairs of electrode rod insertion holes formed at positions corresponding to each other on the pair of holding pieces 38, 38, and have diameters in the order of subscripts a, b, c, and d. Are increased, so that the electrode rods 19 having different diameters can be accommodated. In addition, each electrode rod play insertion hole 4
2a, 42a, 42b, 42b, 42c, 42c, 42
Each of d and 42d is provided with a plunger for pushing the electrode rod 19 forward when the electrode rod 19 is loosely fitted therein.
Its illustration is omitted.

Reference numeral 43 denotes a stopper holding plate attached to the other holding piece 38, which extends from the outer surface of the holding piece 38 to the outside and is mounted in a horizontal direction, and has a substantially half portion on the front side (cutting wheel side). Is thinner than the rear half, on which a measure (scale) 44 is placed. Reference numeral 45 denotes a stopper piece attached to the stopper holding piece 43 so as to be movable at the mounting position. The stopper piece 45 has a concave portion 46 in the lower portion where the rear half portion of the stopper holding piece 43 fits, and a concave portion 46 in the rear half portion. The stopper piece 45 can be slid in the fitted state, and the screw
Can be fixed.

Next, a method of cutting by the cutting section shown in FIG. 5 will be described. The electrode rod 19 to be cut is inserted into the electrode rod loose insertion holes 42, 42 (4 in the example shown in FIG. 5).
2d, 42d), the stopper piece 45 from the opposite side of the stopper.
Insert until the tip touches. In this state, the user grips the handle 40 and pushes it to the front to separate the holder 37 from the cutting wheel 3.
When the cutting wheel 31 is turned to the position 1, the cutting wheel 31 enters the wheel entry groove 39 and hits the electrode rod 19. Therefore, the electrode rod 1 is formed by the grinding wheel portion on the peripheral surface of the cutting wheel 31.
9 is removed. Since the electrode rod 19 is held on both sides of the part to be cut by the pair of holding pieces 38, 38, the electrode rod 19 is smoothly cut without particularly gripping the electrode rod 19, and even if the electrode rod 19 is completely cut off, the electrode rod 19 is eventually cut. There is no danger that the rod 19 will jump. Therefore, the cutting can be performed safely. Further, even if the force is applied with the handle 40 after the cutting, the further rotation of the holder 37 is prevented by the stopper 41, so that the wheel 31 is cut by the cutting wheel 31.
There is no danger of the inner bottom surface being scraped.

When the cutting is completed, the handle 40 is held by the handle 40.
The cutting operation is completed by returning the base 7b to its original upright position and taking out the base part of the electrode rod 19 and the part cut to a predetermined length.

According to the polishing section, even a beginner can perform the cutting operation extremely safely. And the cutting position is the stopper piece 4
Accurate control can be achieved by positioning the 5 by means of the measure (scale) 44, and the electrode rod 19 can be accurately cut to a predetermined length without any skill.

Then, polishing and cutting can be performed with one polishing machine, and it is not necessary to purchase a special cutting machine. In addition, since the rotation of the polishing wheel and the rotation of the cutting wheel are performed by one motor, it is not necessary to separately provide a motor for the polishing wheel and a motor for the cutting wheel.

[0040]

According to the welding electrode polishing machine of the first aspect, it is possible to obtain a good welding electrode by simply setting the electrode rod or removing the electrode rod after polishing without any skill. it can. Incidentally, the cone angle at the tip of the electrode rod can be adjusted by a specified value of the amount of rotation of the electrode rod holding mechanism toward the polishing wheel by a stopper, and this does not require any special skill.

According to the second aspect of the present invention, the electrode rod may be brought into contact with the polishing wheel by moving the moving element of the direction driving mechanism forward and rotating the electrode rod holding mechanism away from the polishing wheel. The electrode rod can be set to the electrode rod holding mechanism in a safe state without any problem. Then, after setting, the moving element is retracted to allow the urging by the urging means of the electrode rod holding mechanism, and further, the polishing of the electrode rod is permitted until it is stopped by the stopper. Done without. Thereafter, when the moving element is moved forward, the electrode rod holding mechanism can be rotated in a direction away from the polishing wheel, and a safe state can be obtained without the electrode rod coming into contact with the polishing wheel. Therefore, removal of the electrode rod from the electrode rod holding mechanism can be performed safely and smoothly. Therefore, the operation of the welding electrode polishing machine can be performed extremely safely. Therefore, even beginners can safely make welding electrodes.

According to the welding electrode polishing machine of the third aspect, even a beginner can perform the cutting operation very safely. The cutting position can be precisely controlled by the position of the stopper piece, and the electrode rod can be accurately cut to a predetermined length without any skill.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a polishing part which is a main part of one embodiment of a welding electrode polishing machine according to the present invention.

FIG. 2 is a cross-sectional view showing an electrode rod holding mechanism of the embodiment.

3A and 3B are diagrams showing the angle of the electrode rod 19 with respect to the polishing wheel 1 at the time of polishing, where FIG. 3A is viewed from the side and FIG. 3B is viewed from above. is there.

FIGS. 4A to 4C are explanatory diagrams of an optimum angle of an electrode rod with respect to a grinding wheel.

FIG. 5 is a perspective view showing a cutting section of the embodiment.

[Explanation of symbols]

1 ... polishing wheel, 1a ... whetstone part, 2 ...
Cover, 7: electrode rod holding mechanism, 14: electrode rod holding holder, 19: electrode rod, 20: urging means (spring), 24: stopper, 26: direction drive Mover (drive screw) of means, 31: cutting wheel, 34: electrode rod holding mechanism to be cut, 36: rotation holding mechanism, 38: holding piece, 39: wheel entry groove, 41: stopper piece.

Claims (3)

[Claims] 1. A polishing wheel rotating mechanism for rotating a polishing wheel having a grindstone portion on a side surface peripheral portion by a motor, and an electrode rod can be rotated so as to be in contact with the polishing wheel at an end in an oblique direction. The movement in the retreating direction (the direction in which the electrode rod moves toward the anti-grinding wheel side along its longitudinal direction) is held in a prescribed state, and the direction in which the tip of the electrode rod contacts the polishing wheel and moves away from the polishing machine body side. An electrode rod holding mechanism rotatably mounted on the electrode rod; an urging means for urging the electrode rod holding mechanism so that the tip of the electrode rod held thereby rotates in a direction in contact with the polishing wheel; A stopper capable of regulating the amount of rotation of the electrode rod holding mechanism in a direction in which the tip of the electrode rod comes into contact with the stopper, the welding electrode polishing machine comprising: 2. The electrode rod holding mechanism is rotated by moving the moving element forward and rotating the electrode rod holding mechanism in a direction in which the tip of the electrode rod moves away from the polishing wheel, or by retreating the electrode rod holding mechanism against the urging force of the urging means. The welding electrode polishing machine according to claim 1, further comprising a direction drive mechanism for allowing the tip of the electrode rod to rotate in a direction in contact with the polishing wheel. 3. A cutting wheel rotating mechanism for rotating a cutting wheel having a cutting portion on a peripheral surface by using a motor for rotating a polishing wheel, and a wheel entry groove into which a peripheral edge of the cutting wheel enters in a non-contact manner. A pair of or plural pairs of electrode rod insertion holes for passing the electrode rod to be cut are formed at a position where the pair of holding pieces are opposed to each other, and an outer side of one of the holding pieces. The stopper piece for stopping the tip of the electrode rod to be cut loosely inserted into the electrode rod play hole of the one holding piece from the electrode rod play hole of the other holding piece has a distance from the one holding piece. The electrode rod holding mechanism to be variably attached, and the electrode rod holding mechanism to be cut, the cutting electrode penetrates into the electrode rod insertion hole when the cutting wheel enters the wheel intrusion groove. The grinder is rotatable so that it can be cut. Claim 1 or 2 welding electrode grinding machine according to characterized in that it has a rotation holding mechanism attached to the side, at least