JP6489703B2 - Electrode chip regenerator and electrode chip regenerator - Google Patents

Description

  The present invention relates to an electrode tip regenerator and an electrode tip regenerator that reshape and regenerate an electrode tip bulged and deformed by electric resistance welding into an initial normal shape, and more specifically, a tip end base as the electrode tip end is extended. While preventing the formation of a stretched residue piece (hereinafter referred to as a skirt piece in the present invention) that protrudes along the outer peripheral surface from the end side toward the base end side of the electrode tip, The present invention relates to an electrode chip regenerator and an electrode chip regenerator that are shaped into a shape.

  In the present invention, “regeneration” is different from the polishing shaping concept in which the bulging deformation portion of the electrode tip is polished or cut into a regular shape, and the deformation portion is pushed to the tip side. This means shaping into a regular shape. In the present invention, the “regular shape” means the shape of the tip portion including the tip surface of the electrode tip when not in use.

  When a current is applied between a pair of electrode tips that are sandwiched between a pair of electrode tips pressed against the front and back surfaces of a workpiece such as a plurality of galvanized steel sheets, for example, the resistance welding machine The galvanized steel sheets are welded to each other by a welding nugget formed by generating heat due to electrical resistance between the plated steel sheets.

The electrode tip used for electric resistance welding has a low electric resistance value because it prevents the work from being excessively damaged due to the pressure contact with the work and allows a high-voltage current to be effectively and stably applied to the work. Soft copper or copper alloy is used.

However, the electrode tip made of copper or copper alloy is relatively easily deformed plastically. It was difficult to keep. As a result, the tip surface of the electrode tip is deformed or worn, resulting in a large contact area with the workpiece, which makes it difficult to stably form a uniform weld nugget due to a change in electrical resistance, resulting in poor welding quality. It was.

  In order to prevent this, conventionally, the deformed portion of the electrode tip was polished (cut) back to the normal shape by the electrode polishing device, but the length of the electrode tip itself was shortened by the polishing operation, and the welding life was shortened. The frequency of electrode tip replacement has increased and the welding cost has increased.

  The present applicant has proposed an electrode tip regenerator shown in Patent Document 1 in order to solve the above-described drawbacks of the conventional electrode tip polishing apparatus. The electrode tip regenerator rotates with the driving of the electric motor, presses the outer peripheral surface forming protrusions against the outer peripheral surface of the tip portion of the electrode tip, and pushes the deformed portion toward the front end surface to have a normal shape. The deformed portion stretched toward the distal end surface by the distal end surface shaping projection that rotates after shaping is placed on the distal end surface of the electrode chip and stretched into a flat shape so that it can be shaped into a regular shape.

However, when the electrode tip regenerator is used to regenerate the electrode tip so as to have a regular shape, a part of the tip portion is opposite to the tip end by the outer peripheral surface forming protrusion that presses against the outer peripheral surface of the tip portion of the electrode tip ( There is a problem that a skirt piece is formed by being extruded around the outer periphery of the base end side of the electrode tip).

When this skirt piece is formed, the remaining extension of the electrode tip becomes the rotational resistance of the electrode tip regenerator, making it difficult to rotate the electrode tip regenerator at a predetermined number of rotations, and the electrode tip can be efficiently Have a problem that can not be played. This problem can be solved by using a high-torque electric motor to rotate the electrode tip regenerator, but has the problem that the electrode tip regenerator is increased in size and cost.

In addition, when the skirt piece formed as described above is cut away from the electrode tip as cutting progresses to become cutting waste, the skirt piece itself as cutting waste is large, so the skirt piece from inside the electrode tip playback tool is large. There is a problem that it is difficult to effectively discharge the pieces, and they are likely to remain inside, resulting in a rotational resistance of the electrode tip regenerator and an obstacle to shaping into a regular formation.

Japanese Patent No. 5131924

The problem to be solved is that when the skirt piece is formed on the electrode tip, the stretched portion of the electrode tip becomes a rotational resistance, making it difficult to rotate the electrode tip regenerating tool at a predetermined rotational speed. is there. In addition, the skirt piece formed when the electrode tip is regenerated becomes large cutting waste, which makes it difficult to effectively eject the skirt piece from the electrode tip regenerator. It is in the point which becomes an obstacle at the time of shaping.

  The invention according to claim 1 is an electrode tip regenerating tool for shaping a deformed tip portion of a resistance welding electrode tip into a regular shape, wherein the electrode tip regenerating tool rotates relative to the electrode tip. The shaping chamber is formed so that the tip of the electrode tip can enter, a cutout portion in which the outer peripheral side is cut out except for the bottom of the shaping chamber, and the inside of the shaping chamber excluding the cutout portion. At the peripheral surface, the height corresponding to the outer diameter of the tip of the electrode tip is provided so as to incline with respect to the rotation direction and extend from the bottom surface to the open end, and can be pressed against the outer peripheral surface of the tip of the electrode tip. In addition, the electrode tip regenerator includes: at least two tip end outer peripheral surface extension portions; and a tip end extension portion provided on the bottom surface of the shaping chamber and press-contactable to the tip end surface of the electrode tip. The outer peripheral shape of the tip of the electrode tip on the notch end face of the notch A cutting member having a first cutting blade having a corresponding curved surface and a second cutting blade corresponding to the shape of the tip surface of the electrode tip is detachably attached and deformed by an electrode tip regenerator that rotates relative to the electrode tip. When the distal end portion of the electrode tip is shaped into a regular shape, an excessively deformed portion of the distal end portion that is stretched by the outer peripheral surface stretched portion of the distal end portion can be removed by the first cutting blade and the distal end surface stretched portion The most important feature is that the excessively deformed portion of the distal end surface that is pushed by can be cut by the second cutting blade.

According to a second aspect of the present invention, there is provided an electrode tip regenerating tool for shaping a deformed tip portion of a resistance welding electrode tip into a regular shape, wherein the electrode tip regenerating tool rotates relative to the electrode tip. A pair of opposing tip tips can enter, and a pair of shaping chambers formed symmetrically with respect to the axial direction and a part of the outer peripheral side except for the bottom of each shaping chamber are notched in common. From the bottom surface to the open end inclined at the height corresponding to the outer diameter of the tip of the electrode tip on the inner periphery of each shaping chamber excluding the notch Each of the tip tips of the respective electrode tips is provided on the bottom surface of each shaping chamber and at least two tip tip outer peripheral surface extension portions that are provided so as to extend and can be pressed against the outer periphery of each tip tip. A distal end surface extending portion that can be pressed against the surface, A first cutting blade having a curved surface corresponding to the outer peripheral surface shape of the corresponding electrode tip tip and a second cutting blade corresponding to the tip surface shape of the electrode tip are provided on the notch end surface of the notch portion in the electrode tip regenerator. Respectively attached cutting members are detachably attached, and the outer peripheral surface of the distal end corresponding to when the distal end of each electrode tip deformed by the electrode tip regenerating tool rotating relative to each electrode tip is shaped into a normal shape. The excessively deformed portion of the tip portion pushed by the extending portion can be cut by the first cutting blade and the excessively deformed portion of the tip surface pushed by the corresponding tip surface extending portion is removed by the second cutting blade. The main feature is to make it excisable.

According to a fourth aspect of the present invention, there is provided an electrode tip regenerator that stretches and deforms a tip of an electrode tip deformed by relatively rotating an electrode tip for resistance welding and an electrode tip regenerator into a regular shape. An electrode motor comprising: an electric motor that rotates one of a chip regenerator and an electrode chip around an axis; and the electrode chip regenerator according to claim 1, wherein the electrode chip regenerator rotates relative to the electrode chip. When the tip portion of the electrode tip is shaped into a regular shape, the excessively deformed portion of the tip portion extended by the corresponding outer peripheral surface extending portion of the tip portion can be removed by the first cutting blade and the corresponding tip The most important feature is that the excessively deformed portion of the distal end surface that is extended by the surface extending portion can be cut by the second cutting blade.

According to a fifth aspect of the present invention, there is provided an electrode tip regenerating apparatus in which a tip portion of an electrode tip deformed by relatively rotating a resistance welding electrode tip and an electrode tip regenerating tool is stretched and shaped into a normal shape. An electric motor that rotates one of the regenerator and the electrode chip around an axis, and the electrode chip regenerator according to claim 2, wherein the regenerator is deformed by the electrode chip regenerator that rotates relative to the electrode chip. When shaping the tip portion of each electrode tip into a regular shape, the excessively deformed portion of the tip portion pushed by the corresponding tip outer peripheral surface extending portion can be removed by the first cutting blade and the corresponding tip The most important feature is that the excessively deformed portion of the distal end surface that is extended by the surface extending portion can be cut by the second cutting blade.

The present invention prevents the formation of skirt pieces when regenerating the electrode tip, and effectively regenerates the electrode tip by effectively rotating the electrode tip regenerating tool even with a low torque electric motor. Can do. In addition, it is possible to efficiently regenerate the electrode tip by finely cutting the scraps such as a skirt piece formed when the electrode tip is regenerated and effectively discharging it.

It is a perspective view which shows the reproduction | regeneration state of the electrode chip | tip by an electrode chip | tip reproduction | regeneration apparatus. It is a perspective view which shows the outline of an electrode chip reproducing | regenerating apparatus. It is a disassembled perspective view of an electrode chip | tip reproduction | regeneration tool. It is a top view of an electrode tip regeneration tool. FIG. 5 is a longitudinal sectional view taken along line AA in FIG. 4. It is explanatory drawing which shows the front-end | tip part of the electrode chip which carried out the bulging deformation. It is explanatory drawing which shows the skirt piece formed when shape | molding an electrode tip. It is explanatory drawing explanatory drawing which shows the shaping state of the electrode tip front-end | tip part by an outer peripheral surface extension part, and the cutting state by a 1st cutting blade. It is judgment surface explanatory drawing which shows the shaping state of the electrode tip front end surface by a front end surface extending part, and the cutting state by a 2nd cutting blade.

  When the tip of the electrode tip deformed by the electrode tip regenerator that rotates relative to the electrode tip is shaped into a regular shape, the excess portion of the tip that is extended by the outer peripheral surface extension portion of the tip is The best mode is to enable excision with one cutting blade and allow the second cutting blade to excise the surplus portion of the distal end surface that is extended by the distal end surface extending portion.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the electrode tip regenerator 1 includes a moving origin of a welding gun 5 provided at the tip of an arm 3 of a known articulated resistance welding machine (not shown) called a so-called welding robot. It is arranged at the position (standby position). A pair of mounting arms are provided on the frame of the welding gun 5 so as to be movable relative to each other at an appropriate interval, and the electrode tips 7 and 9 are exchanged with each mounting arm facing each other with their axes aligned. Fixed as possible.

These electrode tips 7 and 9 are moved in a direction approaching and moving away from each other by an operating member such as an air cylinder connected to one mounting arm or a servo motor provided in a feed screw mechanism, for example, and located between the two, for example, Resistance welding is performed by energization in a state where the workpieces (none of which are not shown) such as a plurality of stacked galvanized steel sheets are pressed against and sandwiched between the front and back surfaces. Each of the electrode tips 7 and 9 is made of copper, copper alloy or the like having a low electric resistance and being easily plastically deformed, having a required axial length, a tip outer periphery having a required outer shape, and gradually reducing the diameter toward the tip. Are formed substantially in a plane.

The electrode tip regenerator 1 is a device that reshapes and regenerates the deformed portion of the tip of the electrode tips 7 and 9 attached to the welding gun 5 moved to the movement origin position into a regular shape. An electrode tip regenerator 11 that is rotatably supported having an axis that coincides with the center axis of the electrode tips 7 and 9 moved to the center, and the electrode tip regenerator 11 is prevented from rotating at the center and is detachably inserted. A rotating plate 15 that is connected to the electric motor 13 and rotated, a fixed plate 17 that prevents the electrode chip regenerator 11 that is screwed to the upper and lower surfaces of the rotating plate 15 from being inserted, and a rotating plate The cover 18 which covers 15 is comprised.

As shown in FIGS. 2 to 5, the electrode tip regenerator 11 is made of a cemented carbide (high speed steel), ceramics or the like so that it can be inserted into the rotating disk 15 so as to be non-rotatable. The shaping chambers 19 and 21 into which the tip portions of the opposing electrode tips 7 and 9 can enter are formed symmetrically in the axial direction at the lower and upper portions thereof. The electrode tip regenerator 11 is rotated in the clockwise direction as shown in the figure as the electric motor 13 is rotated.

The shaping chambers 19 and 21 are formed in a cup shape having a size that allows the tip portions of the electrode tips 7 and 9 to enter, and the center portions of the bottom surfaces of the shaping chambers 19 and 21 (the upper surfaces of the partition walls between the shaping chambers 19 and 21). At the center portion and the bottom surface center portion, tip end surface extending portions 23 and 25 are formed integrally with the tip surfaces of the electrode tips 7 and 9 so as to extend in the horizontal direction shown in the figure. Each of the tip surface extending portions 23 and 25 has a center at a position slightly decentered from the center axis of the electrode tip regenerator 11, and is formed to be slightly longer than the tip surface width of the electrode tips 7 and 9 at a required height. .

Near the outer periphery of each shaping chamber 19, 21, a cutting waste discharge hole 27 extending in the axial direction and penetrating the partition between the shaping chambers 19, 21 is formed. Further, on the outer peripheral side opposite to the cutting waste discharge hole 27 in the electrode tip regenerator 11, the width is orthogonal to the axial line extending from the outer periphery to the proximal end of the distal end surface extending portions 23 and 25, and the notch surface 29a is the distal end surface. A cutout portion 29 cut out at a predetermined angular width extending to both ends in the horizontal direction of the extended portions 23 and 25 is formed over the entire axial direction.

A locking recess 31 extending from the outer periphery of the electrode tip regenerator 11 in the direction orthogonal to the axis is provided in the middle of the notch end surface 29a located on the opposite side of the notch 29 in the rotational direction. A threaded hole 33 is formed in the electrode tip regenerator 11 corresponding to the centripetal side in the locking recess 31 formed in the partition between the shaping chambers 19 and 21.

The inner peripheral surfaces of the shaping chambers 19 and 21 excluding the cutting waste discharge hole 27 and the notch 29 are pressed against the deformed portion of the outer peripheral surface of the distal end portion of the electrode tips 7 and 9 and extended to the distal end surface side 2 The outer peripheral surface extending portions 35 and 37 are formed. Each of the outer peripheral surface extending portions 35 and 37 protrudes at a required height in each of the shaping chambers 19 and 21 and is curved with respect to the rotation direction of the electrode tip regenerator 11. The outer peripheral surface extended portions 35 and 37 are set so that the curvature radii of the top ridge lines coincide with the curvature radii of the tip portions of the regular-shaped electrode tips 7 and 9. The extending portions 35 and 37 of the outer peripheral surfaces of the shaping chambers 19 and 21 are provided in a mirror-symmetrical manner around the middle in the axial direction of the electrode chip regenerator 11.

As shown in FIG. 4, a cutting member 39 having an appropriate thickness is fixed to the notch end surface 29 a of the notch 29 by a fixing screw 51. The cutting member 39 is formed of, for example, high-speed steel, cemented carbide, ceramics, etc., and first cuts and polishes the outer peripheral surfaces of the tip portions of the electrode tips 7 and 9 entering the shaping chambers 19 and 21, respectively. The cutting blades 41 and 43 and the second cutting blades 45 and 47 for cutting and polishing the tip surfaces of the electrode tips 7 and 9 are formed symmetrically in the vertical direction shown in the figure.

In addition, an engaging protrusion 49 is provided at the center of the upper surface of the cutting member 39 in the rotational direction so as to be inserted and positioned in a locking recess 31 provided on one notch end surface 29a of the electrode tip regenerator 11. A screw hole 53 into which a fixing screw 51 for screwing the cutting member 39 to the electrode tip regenerator 11 is inserted is formed in the cutting member 39 corresponding to the engaging projection 49.

The lower surface in the rotational direction of the cutting member 39 functions as the rake face of the first cutting blades 41 and 43 and the second cutting blades 45 and 47, and the rake face of the cutting member 39 shown in the embodiment is 0 degrees. The rake face angle should be set within the range of ± 5 degrees.

Each of the first cutting blades 41 and 43 described above is vertically symmetric with respect to the direction orthogonal to the axis in the middle of the axial direction of the electrode tip regenerator 11 and has a regular shape from the open end side of the shaping chambers 19 and 21 toward the bottom side. Deformation in the electrode tips 7 and 9 which is formed in an R curved surface approximate to the outer peripheral surface of the distal end portion of the electrode tips 7 and 9 and is extended toward the proximal end portion side of the distal end portion by the outer peripheral surface extending portions 35 and 37 By polishing (cutting) the portion, the skirt pieces 7a and 9a are prevented from being formed, and the tip surface is polished (cut) by polishing (cutting) the deformed portions of the electrode tips 7 and 9 that are pushed to the tip surface side. It is prevented that the electrode tip regenerator 11 is turned up excessively and becomes a rotational resistance of the electrode tip regenerator 11.

Further, each of the second cutting blades 45, 47 extends in the direction orthogonal to the axis of the electrode tip regenerator 11 toward the respective distal end surface extending portions 23, 25 continuously to the corresponding first cutting blades 41, 43, It is possible to prevent rotation resistance of the electrode tip regenerator 11 by polishing (cutting) part of the tip surface of the electrode tips 7 and 9 that are stretched and mounted by the tip end surface extending portions 23 and 25. To do.

Next, the regenerating action of the electrode tips 7 and 9 by the electrode tip regenerating tool 11 configured as described above will be described. For convenience of explanation, FIGS. 5 to 10 show the regeneration action of the electrode tip 7 by the shaping chamber 19 located above, but the same applies to the regeneration action of the electrode tip 9 by the shaping chamber 21 below. The illustration is omitted.

As shown in FIG. 6, the electrode tips 7, 9 attached to the welding gun 3 of the resistance welder are pressed by the tip of the electrode tips 7, 9 due to pressure welding to the workpiece, heat during resistance welding, etc. The diameter is crushed and the tip surface is deformed due to wear or melting due to pressure contact with the workpiece. In FIG. 6, a state in which the tip portions of the electrode tips 7 and 9 are crushed to increase the diameter or a part thereof is worn and bulged and deformed is indicated by a solid line, and a normal shape is indicated by an alternate long and short dash line.

Since the electrode tips 7 and 9 bulging and deforming as described above change the contact area with the workpiece and press contact with a uniform force, it becomes difficult to form a uniform weld nugget, and resistance welding loss deteriorates. It is necessary to shape the tip portions of the bulged and deformed electrode tips 7 and 9 into a regular shape indicated by a one-dot chain line in FIG.

  For example, when the number of times of welding reaches a predetermined number of times, when a plurality of shots of a workpiece are welded, when a required number of workpieces are welded, This is performed at the time of standby when the welding gun 3 is returned to the movement origin position under a situation such as until the work is carried to the required welding position.

That is, when the electrode tips 7 and 9 moved to the standby position are moved in the directions approaching each other into the shaping chambers 19 and 21 of the electrode tip regenerator 11 that rotates as the electric motor 13 is driven to rotate. The outer peripheral surface extending portions 23 and 25 that rotate with respect to the deformed portion that bulges at the tip portion of the electrode tips 7 and 9 are in pressure contact, and most of the deformed portion is directed to the tip surface side and part of the electrode portion is an electrode. It is extended so that it may go to the base end side of tip 7 * 9 tip part. (Refer to the left cross section of FIG. 8; however, FIG. 8 shows the upper shaping chamber, and the left cross section shows the top ridge line of the outer peripheral surface extending portion for convenience of explanation.)

Then, the deformed portion pushed to the front end side by the outer peripheral surface extending portions 35 and 37 that are in pressure contact is formed in an uneven shape, and the tip end surface that presses while rotating with respect to the tip end surface raised after being raised to the tip end surface It is shaped so as to be formed into a regular shape by being pushed flat by the extending portions 23 and 25. (Refer to the left cross section of FIG. 9; however, FIG. 9 shows the upper shaping chamber, and the left cross section shows the extended portion of the outer peripheral surface as a top ridge for convenience of explanation.)

As described above, when a part of the deformed portion that bulges at the tip of the electrode tips 7 and 9 is stretched toward the base end side of the tip of the electrode tips 7 and 9, as shown in FIG. 7a and 9a are formed. In the present embodiment, as shown in the right cross section of FIG. 8, the proximal end side of the distal end portion is formed by the open end side portions of the first cutting blades 41 and 43 in the cutting member 39 that contacts the outer peripheral surface of the distal end portion of the electrode tips 7 and 9. It is possible to prevent the skirt pieces 7a and 9a from being formed by cutting and removing a part of the deformed portion that is stretched toward the front.

Further, when the deformed portions of the electrode tips 7 and 9 are pushed to the tip side by the outer peripheral surface extending portions 35 and 37 while being uneven, as shown in the right cross section of FIG. The cutting resistance of the electrode tip regenerator 11 is reduced by cutting and removing the excessively deformed portion that is pushed by the bottom portion of the first cutting blades 41 and 43 of the cutting member 39 that contacts the outer peripheral surface of the tip side. can do.

Further, as described above, when the deformed portion pushed to the front end side by the outer circumferential surface extending portions 35 and 37 is raised to the front end surface, the raised front end surface as shown in the right cross section of FIG. By cutting and removing the excess raised portions with the second cutting blades 45 and 47 of the cutting member 39 that comes into contact, the rotational resistance of the tip surface extending portions 23 and 25 that press against the raised tip surface is reduced. Can do.

In addition, the excessive deformation | transformation part cut | disconnected by the cutting member 39 while being extended by the outer peripheral surface extension parts 35 and 37 and the front end surface extension parts 23 and 25 does not grow large, and it passes through the notch part 29. Then, it is discharged out of the electrode tip regenerator 11.

In addition, foreign matter adheres to the tip of the electrode tips 7 and 9 during welding work, or metal melted and evaporated from the work due to heat during energization is deposited to form an oxide alloy film having a hardness higher than that of the electrode tips 7 and 9. However, when the electrode tips 7 and 9 are regenerated, the outer peripheral surface extension portion is rotated while rotating the electrode tip regenerating tool 11 with respect to the outer peripheral surface of the tip portion of the electrode tips 7 and 9 prior to the above-described regeneration operation. 35 and 37, and the tip surface extension portions 23 and 25 are pressed against the tip surface, and the attached foreign matter and the oxide alloy film are scraped off and discharged from the cutting waste discharge hole 27, so that the regeneration operation is efficient. To do.

In this embodiment, the tip end portions 35 and 37 are pressed to the tip portions of the electrode tips 7 and 9 deformed by pressure contact with the workpiece, and the tip surface extension portions 23 and 25 are pressed to the tip surface to form a regular shape. When shaping the skirt pieces 7a and 9a, the excessively deformed portions pushed toward the proximal end side of the tip portions of the electrode tips 7 and 9 by the first cutting blades 41 and 43 of the cutting member 39 are cut off. In addition, the first cutting blades 41 and 43 and the second cutting blades 45 and 47 are used to cut off excessive deformed portions that are pushed to the tip surface side of the electrode tips 7 and 9 to remove the electrode tip regenerating tool 11. It is possible to reduce the rotational resistance and efficiently reshape the electrode tips 7 and 9 into a regular shape and reproduce them.

In the above description, the electrode tips 7 and 9 are shaped into a normal shape and regenerated by the electrode tip regenerator 11 that rotates with the swelled and deformed electrode tips 7 and 9 attached to the welding gun 3. When the electrode tip 7 or 9 is removed from the welding gun 3 and the regenerating work is performed, the electrode tip 7 or 9 removed with the electrode tip regenerating tool 11 fixed is rotated and regenerated. Of course, it may be.

In the above description, the electrode chip regenerator 1 and the electrode chip regenerator 11 are provided so that the shaping chambers 19 and 21 are provided on both sides in the axial direction of the electrode chip regenerator 11 to regenerate the pair of electrode chips 7 and 9 at the same time. However, the electrode chip regenerator may be provided with one shaping chamber, and the electrode chip regenerator and the electrode chip regenerator that reshape and regenerate the electrode chips one by one.

DESCRIPTION OF SYMBOLS 1 Electrode tip reproducing | regenerating apparatus 3 Arm 5 Welding guns 7 and 9 Electrode tips 7a and 9a Skirt piece 11 Electrode tip regenerating tool 13 Electric motor 15 Turntable 17 Fixed platen 18 Covers 19 and 21 Shaping chambers 23 and 25 Tip surface extension part 27 Cutting waste discharge hole 29 Notch 29a One notch end face 31 Locking recess 33 Screw hole 35/37 Outer peripheral surface extended part 39 Cutting member 41/43 First cutting blade 45/47 Second cutting blade 49 Joint protrusion 51 Fixing screw

Claims (6)

In the electrode tip regenerator that shapes the regular tip by stretching the deformed tip of the resistance welding electrode tip,
The electrode tip regenerator is:
Can rotate relative to the electrode tip,
A shaping chamber formed so that the tip of the electrode tip can enter,
A cutout part in which a part on the outer peripheral side is cut out except for the bottom of the shaping room;
At the height corresponding to the outer diameter of the tip of the electrode tip on the inner peripheral surface of the shaping chamber excluding the notch, provided to incline with respect to the rotation direction and extend from the bottom surface to the open end, At least two tips of the outer peripheral surface of the electrode tip tip portion, and a stretched portion of the outer peripheral surface of the tip portion;
Provided on the bottom surface of the shaping chamber, a distal end surface extending portion that can be pressed against the distal end surface of the electrode tip,
With
The notch end surface of the notch portion in the electrode tip regenerator has a first cutting blade having a curved surface corresponding to the outer peripheral surface shape of the electrode tip tip portion and a second cutting blade corresponding to the tip surface shape of the electrode tip. Removably attach the cutting member,
When the tip of the electrode tip deformed by the electrode tip regenerator that rotates relative to the electrode tip is shaped into a regular shape, an excessively deformed portion of the tip that is pushed by the outer peripheral surface of the tip is extended. An electrode tip regenerator that enables excision with a first cutting blade and enables excision of an excessively deformed portion of the distal end surface that is extended by a distal end surface extending portion with a second cutting blade. In the electrode tip regenerator that shapes the regular tip by stretching the deformed tip of the resistance welding electrode tip,
The electrode tip regenerator is:
Can rotate relative to the electrode tip,
A pair of shaping chambers, each of which is capable of entering a pair of opposing electrode tip tips and formed symmetrically with respect to the axial direction,
A cutout part in which a part of the outer peripheral side is cut out in common except for the bottom of each shaping room,
Provided on the inner peripheral surface of each shaping chamber excluding the above-mentioned notch, at a height corresponding to the outer diameter of the tip of the electrode tip, so as to incline with respect to the rotation direction and extend from the bottom surface to the open end. And at least two distal end outer peripheral surface extending portions that can be press-contacted to the outer peripheral surface of each electrode tip,
Provided on the bottom surface of each shaping chamber, a distal end surface extending portion capable of being pressed against the distal end surface of each electrode chip,
With
A first cutting blade having a curved surface corresponding to the outer peripheral surface shape of the corresponding electrode tip tip and a second cutting blade corresponding to the tip surface shape of the electrode tip are provided on the notch end surface of the notch portion in the electrode tip regenerating tool. Removably attach each cutting member
When the tip of each electrode tip deformed by an electrode tip regenerator that rotates relative to each electrode tip is shaped into a regular shape, An electrode tip regenerator that makes it possible to excise an excessively deformed portion with a first cutting blade and to excise an excessively deformed portion of a tip surface that is pushed by a corresponding tip surface extending portion with a second cutting blade. In any one of Claims 1 and 2,
The notch end surface of the notch is provided with a locking recess and the cutting member is provided with an engaging portion that engages with the locking recess, and the cutting member is engaged with the locking recess and the engaging portion is engaged with the locking recess. An electrode tip regenerator that can be fixed by screwing in a state where it is engaged and positioned. In the electrode tip regenerator for shaping the normal shape by pushing the tip of the electrode tip deformed by rotating the electrode tip for resistance welding and the electrode tip regenerator relatively,
An electric motor that rotates one of the electrode chip regenerator and the electrode chip about an axis, and the electrode chip regenerator according to claim 1;
With
When the tip of the electrode tip deformed by the electrode tip regenerator that rotates relative to the electrode tip is shaped into a normal shape, the excess of the tip tip pushed by the corresponding outer peripheral surface extension portion An electrode tip regenerator that makes it possible to excise a deformed portion with a first cutting blade and to excise an excessively deformed portion of the tip surface that is pushed by a corresponding tip surface extending portion with a second cutting blade. In the electrode tip regenerator for shaping the normal shape by pushing the tip of the electrode tip deformed by rotating the electrode tip for resistance welding and the electrode tip regenerator relatively,
An electric motor that rotates either one of the electrode tip regenerator and the electrode tip about an axis;
An electrode tip regenerator according to claim 2,
With
When the tip of each electrode tip deformed by an electrode tip regenerator that rotates relative to the electrode tip is shaped into a regular shape, the tip of the tip that is extended by the corresponding tip outer peripheral surface extension An electrode tip regenerator that makes it possible to excise an excessively deformed portion with a first cutting blade and to excise an excessively deformed portion of the tip surface that is pushed by a corresponding tip surface extending portion with a second cutting blade. In any of claims 4 and 5,
The notch end surface of the notch is provided with a locking recess and the cutting member is provided with an engaging portion that engages with the locking recess, and the cutting member is engaged with the locking recess and the engaging portion is engaged with the locking recess. An electrode chip regenerator that can be fixed by screwing it in a state where it is engaged and positioned.

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