WO2021029588A1

WO2021029588A1 - Cutter holder assembly for tip dresser

Info

Publication number: WO2021029588A1
Application number: PCT/KR2020/010218
Authority: WO
Inventors: 박정희
Original assignee: 주식회사 팍스랩; 박정희
Priority date: 2019-08-13
Filing date: 2020-08-03
Publication date: 2021-02-18
Also published as: KR102070946B1

Abstract

The present invention relates to a cutter holder assembly for a tip dresser and, more particularly, to a cutter holder assembly for a tip dresser, which not only prevents a chip, which is cut from a welding tee during a tip dressing operation, from being fused and attached to a cutter, but also enables smooth discharge of the generated chip so as to improve the operation efficiency thereof. To this end, according to the present invention, a pushing part which performs an elastic movement is configured in a cutter holder assembly for a tip dresser, the cutter holder assembly including a holder part and a cutter.

Description

Cutter holder assembly for tip dresser

The present invention relates to a cutter holder assembly for a tip dresser, and more particularly, prevents the chips cut from the welding tip from sticking to the cutter during the tip dressing operation, and at the same time facilitates discharging the generated chips to increase work efficiency. It relates to a cutter holder assembly for a tip dresser made to be able to.

In general, for mass production of certain products such as automobile production lines, spot welding with high stability of the weld zone is mainly used because the heating time is short compared to other welding, so the working speed is fast and the heating range is narrow, so there is little residual stress or deformation.

Such spot welding is usually carried out by mounting a welding gun on a robot or on a frame installed on the ground, and there are welding guns that perform welding work in the vertical direction or the welding work in the left and right directions, and have a C shape or X There are various types such as shape and shape.

This welding gun includes a shank installed facing the upper end of the arm installed so as to be rotatable, and a welding tip attached to the end of the shank to perform welding.The welding tip has a semicircular shape and is made of copper. Contains ingredients.

On the other hand, in the welding tip, when the tip is worn by pressure and heat due to the welding work, and the end is melted and the wear progresses beyond the allowable limit, the resistance value changes and welding failure occurs.Therefore, a dressing work on the welding tip must be performed periodically.

(Patent Document 0001) Looking at such a tip dressing operation through Korean Laid-Open Patent Publication No. 10-2012-0112907 with reference to Figs. 1 (a) (b), one side of the spot welding gun is usually a tip dresser (TIP DRESSER, 10 ) Is installed to rotate the cutter holder assembly 20 corresponding to the type of the welding tip 31 by a driving motor.

In addition, a desired contact surface is secured by cutting the tip surface of the welding tip 31 using the cutter 22 provided in the cutter holder assembly 20.

Typically, such a cutter holder assembly 20 is installed to be rotated in the mounting space 11 of the tip dresser 10, and is integrally mounted to the holder 21 inserted into the mounting space 11 and the holder 21 It comprises a cutter 22 for substantially cutting the welding tip 31.

In addition, it may include an upper cover 23 and a lower cover 24 according to the structure of the holder 21 to be mounted and the need.

On the other hand, the dressing operation by the cutter holder assembly 20 of the tip dresser 10 is cut in the process of grinding the welding tip 31 drawn in by the rotation of the processing cutter 22 rotating together with the holder 21. Chips are inevitably generated, and these chips are processed through the discharge space 21a of the holder 21.

Meanwhile, chips generated during the tip dressing operation are collected and processed while preventing scattering of chips generated through the disclosed chip collector unit, as in Korean Patent Publication No. 10-1696263 (Patent Document 0002).

However, during the tip dressing operation, as shown in FIG. 2, the welding tip debris, that is, the chip (ch), dressed on the rotating cutter 22, is caused by the heat generated between the cutter 22 and the welding tip 31. The phenomenon of sticking to 22) and fusion occurs.

In this way, as the chips fused to the cutter 22 are fixed, the defect rate of the tip dressing operation is increased, and a case of being caught on the discharge space 21a of the holder occurs due to continuous chip fusion, thereby reducing the collection rate of chips. As a result, the discharge space 21a is blocked by the fused chips over time, resulting in a problem of lowering the working efficiency of the entire device.

Accordingly, such a problem in the related art, that is, during the tip dressing operation, the chip (Ch) dressing is fused to the processing cutter 22 of the cutter holder assembly 20 and is completely removed without being agglomerated or pinched on the discharge space 21a. There is an urgent need to develop a device that can be collected and collected.

The present invention has been conceived to solve the above-described problems, and prevents the chipped chips from sticking to the cutter during the tip dressing operation, and at the same time facilitates the discharge of the generated chips to increase the convenience of use. It is an object thereof to provide a holder assembly.

In order to achieve the above object, the cutter holder assembly for a tip dresser according to the present invention includes a holder portion rotating according to a setting, and a cutter integrally mounted on the holder portion to perform a tip dressing operation for the welding tip. .

At this time, the cutter forms a pin hole penetrating through one side.

And, as it is mounted protruding in the pin hole and moves elastically, it is pushed backward by the cut chips during the tip dressing operation, and then moved to the front after the tip dressing operation, pushing the chips attached to the cutter to the outside of the cutter and dropping them. Consists of wealth.

In one embodiment, the pushing unit includes a ball pin mounted in the pushing unit mounting hole of the holder and penetrating through the pin hole so that the end protrudes, and an elastic member seated in the pushing unit mounting hole to provide an elastic force to the ball pin. Make up.

And, if necessary, the pushing unit is configured to further include a tanning bolt coupled to the pushing unit mounting hole to support the elastic member.

On the other hand, the ball pin is formed to protrude along the outer circumferential edge of the end positioned in the pushing part mounting hole, and is prevented from being separated from the front by being caught by the chin formed at the end of the pushing part mounting hole.

On the other hand, the holder unit applied to the present invention, in an embodiment, forms a plurality of wing portions formed to protrude upwardly with a set interval along the upper edge.

Specifically, the wing portion is characterized in that it has a plurality of radial shapes in a curved shape from the inside to the outside.

In addition, the cutter applied to the present invention is characterized in that the length (b1) of the upper cutter blade portion and the length (b2) of the lower cutter blade portion are different from each other to prevent reverse mounting to the holder portion.

And, if necessary, the cutter forms a concave-convex part at the tip end contacting the retracted welding tip.

As described above, in the cutter holder assembly for a tip dresser according to the present invention, chips are fused to the inside of the cutter holder assembly without being fixed or stacked by pushing the bundle of chips cut according to the tip dressing operation away from the cutter using the pushing unit. It has the effect of smoothing the discharge.

In addition, while rotating through the air inlet path formed by a plurality of wings formed protruding with a set interval on the upper part of the cutter holder assembly, external air was introduced into the discharge space of the holder part, so that it was caught or stayed in the discharge space. It has the effect of increasing the collection efficiency of chips by completely discharging the chips.

In addition, as the uneven portion is formed at the tip of the cutter for cutting the welding tip, an uneven surface is formed on the front end of the welding tip to be dressed to increase the cross-sectional area. It has the effect of increasing the welding work efficiency by increasing the current.

In addition, by forming different lengths of the upper and lower cutter blades of the cutter for cutting the welding tip, the cutter is prevented from being mounted in the holder in the reverse direction, thereby increasing work efficiency.

1(a)(b) is a view showing a tip dresser to which a cutter holder assembly according to the prior art is applied.

2 is a view showing a state in which chips are fused and attached to a cutter constituting a cutter holder assembly according to the prior art during a tip dressing operation.

3 is a perspective view showing a cutter holder assembly for a tip dresser according to the present invention.

4 and 5 are views showing the structure of the cutter holder assembly for a tip dresser according to the present invention and an operating state thereof.

6 is a view showing the air inflow by the blade portion of the cutter holder assembly for a tip dresser according to the present invention.

7 to 9 are views showing an embodiment of a cutter applied to the cutter holder assembly for a tip dresser according to the present invention.

The present invention includes a holder unit 110 that rotates according to a setting and a cutter 120 integrally mounted on the holder unit 110 to perform a tip dressing operation for the welding tip 31 in the best form. In the cutter holder assembly for a tip dresser,

The cutter 120 forms a pin hole 121 penetrating through one side;

As the pin hole 121 is protrudingly mounted and elastically moved, the chip (ch) that was pushed to the rear by the cut chip (ch) during the tip dressing operation, and then moved back to the original position after the tip dressing operation, and was attached to the cutter (120). It proposes a cutter holder assembly for a tip dresser, characterized in that it comprises a pushing unit 130 for pushing and dropping the cutter 120 to the outside.

Hereinafter, preferred embodiments of the cutter holder assembly according to the present invention will be described in detail with reference to the accompanying drawings.

And, in the description of the present invention, the upper or the upper portion of the reference to Figure 3 to indicate a portion or direction of the wing portion is formed, and the lower or lower portion will be described as pointing to the opposite portion or its direction.

In addition, the inner or inner side shall indicate the central portion or the direction of the holder portion in which the welding tip is cut by the cutter, and the outer or outer side shall be described as indicating the opposite portion or the direction thereof.

In addition, in describing the present invention, detailed descriptions of related known functions or configurations will be omitted so as not to obscure the subject matter of the present invention.

On the other hand, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

As shown, the cutter holder assembly 100 for a tip dresser according to the present invention performs a tip dressing operation on the welding tip 31 that is attached to the tip dresser and is inserted therein.

To this end, the cutter holder assembly 100 for a tip dresser of the present invention includes a holder unit 110 that rotates according to a setting, and a welding tip 31 that is integrally mounted on the holder unit 110 and is inserted from the top or bottom. It includes a cutter 120 for performing a tip dressing operation.

At this time, the holder part 110 is mounted in the mounting space (Figures 1, 11) of a commonly known tip dresser (Figures 1 and 10), has a shape corresponding to the mounting space, and forms a discharge space 114 on one side. And, it includes a body 111 having a mounting hole 113 in which the welding tip 31 is inserted and seated at the upper and lower portions, respectively.

In addition, the holder unit 110 of the present invention is an embodiment, integrally formed with a donut disk-shaped top plate 112 on the upper portion of the body 111.

Preferably, the upper plate 112 has a size that can be seated on the upper portion of the mounting space of the tip dresser and has a coupling hole 112a formed on one side thereof so as to be coupled to the tip dresser by a fastening member.

In the present invention, in the configuration of the holder unit 110, the body 111 and the upper plate 112 are integrally molded and described as an example, but the holder unit 110 is a cutter in the mounting space of the tip dresser. It is for fixing and supporting the 120, but is not limited thereto.

Meanwhile, the cutter holder assembly 100 for a tip dresser of the present invention prevents the cutter 120 from sticking to the cutter 120 even after the tip dressing operation by fusion of the chip (ch) cut by the cutter 120 during the tip dressing operation. It is characterized in that the discharge of the chip (ch) is made smoothly.

To this end, as shown in FIG. 3, the cutter holder assembly 100 for a tip dresser of the present invention further includes a holder part 110, a cutter 120, and a pushing part 130.

At this time, the cutter 120 is formed to penetrate the pin hole 121 on one side.

In addition, the pushing unit 130 is configured to push the chip (ch) cut during the tip dressing operation to the outside of the cutter 120 as it is mounted to protrude in the pin hole 121 and is elastically moved.

In other words, as the pushing unit 130 is mounted to protrude to the pin hole 120 and is elastically moved, the rear-discharging space by the rotational force of the holder unit 110 and the cut chips (ch) during the tip dressing operation ( 114) is pushed in the direction away from-and then moved to the original position after the tip dressing operation, pushing the chip (ch) attached to the cutter 120 to the outside of the cutter 120 and dropping it.

The pushing part 130 is composed of a ball pin 131 having elasticity and may be mounted in the pin hole 121 of the cutter 120.

Meanwhile, referring to FIGS. 3 to 5 as another embodiment, a cutter holder assembly 100 for a tip dresser including the pushing unit 130 will be described as follows.

In another embodiment, the pushing unit 130 is provided across the cutter 120 and the holder unit 110 to increase stability.

As shown, the cutter 120 forms a pin hole 121 penetrating through one side.

Further, a pushing part mounting hole 115 is formed in the body 111 of the holder part 110 at a position corresponding to the pin hole 121 of the cutter 120.

It goes without saying that the pushing part mounting hole 115 may be formed to pass through the body 111 or formed in a groove shape as needed.

In the drawing, the pushing part mounting hole 115 is shown to pass through the body 111.

In this case, as an embodiment, the pushing unit 130 includes a ball pin 131 and an elastic member 133.

Specifically, the ball pin 131 is mounted in the pushing part mounting hole 115 of the holder part 110 and positioned to penetrate the pin hole 121.

Further, the elastic member 133 is configured to be seated in the pushing unit mounting hole 115 to provide an elastic force to the ball pin 131.

Preferably, the elastic member 133 uses a spring.

The elastic member 133 is located on the rear side of the ball pin 131, that is, on the opposite side of the protruding portion through the pin hole 121, and is configured to be integrally fitted with the ball pin 131 or simple It can be configured in a contacted state to transmit the elastic force.

On the other hand, when the pushing unit 130 applied to the present invention is in the shape of a hole through the body 111, the pushing unit mounting hole 115 is a pushing unit so that the elastic member 133 is not separated or removed during the tip dressing operation. It is configured to include a tanning bolt 132 that is coupled to the mounting hole 115 to support the elastic member 133.

The above-described tanning bolt 132 is for supporting by blocking the opening side opposite to the cutter 120 of the pushing part mounting hole 115, and has a bolt shape, but may be a pin or a stopper.

On the other hand, preferably, the ball pin 131 constituting the pushing unit 130 may be configured to have a locking protrusion to prevent the pushing unit mounting hole 115 from escaping or escaping.

Referring to FIG. 4, the ball pin 131 is formed at the end of the pushing part mounting hole 115 by forming a ball pin tuck 131a to protrude along the outer circumferential edge of the end located in the pushing part mounting hole 115. By being caught in the front-cutter 120 side direction-to prevent separation.

As described above, the cutter holder assembly 100 for a tip dresser according to the present invention is fused to and fixed to the cutter 120 by the heat generated by the chip (ch) bundles cut by the cutter 120 during the tip dressing operation. It has a structure including a pushing unit 130 to prevent and smoothly discharged toward the discharge space 114.

As described above, the operation of the cutter holder assembly 100 for a tip dresser having the pushing unit 130 of the present invention will be described with reference to FIGS. 3 to 5 again.

First, when the tip dressing operation by the cutter 120 is performed while the holder unit 110 mounted in the mounting space rotates, the chips cut while being cut from the welding tip are lumped together and escape to the discharge space 114. Smaller or smaller chips are scattered and exited into the discharge space 114.

At this time, the chips (ch) bunched together while being cut by the cutter 120 move the pushing part 130 protruding in the discharge space 114 according to the rotational force of the holder part 110 to the rear-away from the discharge space 114 It is pushed in the direction -.

At this time, the pushing unit 130 is configured to have elasticity and can be elastically linearly reciprocated, and is pushed in the rear-the direction away from the discharge space 114, the direction of the pushing unit mounting hole 115-by the rotational force and the bundle of chips. Fly.

Then, when the holder unit 110 stops rotating, the pushing unit 130 is brought to its original position in the front direction-the cutter 120 side direction-by the elastic force.

At this time, while the pushing part 130 is in its original position, the tip of the pushing part 130 that protrudes while passing through the pin hole 121 of the cutter 120, that is, the protruding end of the ball pin 131 is attached to the cutter 120 The existing chip (ch) is pushed out, and accordingly, the chip (ch) is not fixed to the cutter 120 and falls to the discharge space 114 side.

In addition, chips that have fallen from the cutter 120 fall downward through the discharge space, and are collected and processed according to various conventionally known chip collector structures.

On the other hand, referring again to FIGS. 3 and 6, the cutter holder assembly 100 for a tip dresser according to the present invention has a structure including a wing part 140 to more smoothly process the cut chips (ch). Have.

Specifically, the holder portion 110 constituting the cutter holder assembly 100 for the tip dresser further includes a plurality of wing portions 140 formed to protrude upward with a set interval (a) along the upper edge To configure.

In the illustration, the holder part 110 of the present invention is a structure formed by integrally molding the top plate 112 in the shape of a donut disk on the upper part of the body 111, and a plurality of wing parts 140 ) Is shown by forming along the upper edge of the upper plate 112.

These wing parts 140 preferably have an angle α from the inside to the outside and have a plurality of radial shapes in a curved shape.

In addition, the wing 140 described above is preferably formed to protrude to the upper side of the tip dresser.

The spacing (a) between the plurality of wing portions 140 and the wing portion forms an air inflow path (h).

Accordingly, the flow of air formed by the centrifugal force generated by the rotation of the holder unit 110 is guided to the air inflow path h according to the shape of the wing part 140, and flows in through the air inflow path h. The air makes a flow of air discharged downward from the discharge space 114 so that chips (ch) generated during the tip dressing operation are easily discharged downward.

The chip (ch) discharged in this way is collected and processed through the chip collector.

On the other hand, the tip dresser may generally include an air injection unit 40 to prevent scattering of the upper portion of the chip ch and facilitate discharge.

At this time, the air injected from the air injection unit 40 is more intensively guided to the lower side of the discharge space of the holder unit 110 through the air inlet path h formed by the wing unit 140, thereby smoothly discharging the chip. This can be done.

Meanwhile, referring to FIGS. 4 and 7 to 9 again, a cutter 120 constituting the cutter holder assembly 100 for a tip dresser according to the present invention will be described as follows.

As described above, the cutter 120 is integrally mounted on the holder unit 110 to directly perform a tip dressing operation for the welding tip 31 that is drawn from the top or bottom.

To this end, the cutter 120 includes an upper cutter part having a cutting line in a shape corresponding to the welding tip 31 inserted into the upper mounting hole 113 of the holder part 110 and a lower mounting hole 113 It is composed of a lower cutter portion having a cutting line having a shape corresponding to the welding tip drawn into the furnace, and the upper cutter portion and the lower cutter portion are formed to correspond to the center center line (C1).

The cutter 120 is seated and coupled to the mounting groove of the holder unit 110, and is usually fastened to the bolt hole 122 of the holder unit 110 using a fastening bolt (F).

On the other hand, the cutter 120 forms the most suitable cutting angle to facilitate the tip dressing operation, that is, cutting processing for the welding tip by the cutting line, and the upper side and the lower side should not be assembled in the reverse direction.

Therefore, referring to Figure 9, the cutter 120 of the present invention is the length (b1) of the upper cutter blade (124a) and the length of the lower cutter blade (124b) to prevent reverse mounting to the holder 110 (b2) is formed differently.

Accordingly, when the operator mounts the cutter 120 to the holder unit 110, the upper and lower portions are prevented from being assembled in the reversed state.

On the other hand, referring to FIGS. 7 and 8, the cutter 120 applied to the present invention is configured to increase the welding efficiency by increasing the instantaneous current by increasing the frictional resistance of the contact surface of the object to be welded during the welding operation using the welding tip. can do.

Typically for aluminum welding, etc., the cutter 120 applied to the present invention for this purpose has a structure capable of increasing the cross-sectional area of the welding tip.

Specifically, the cutter 120 of the present invention forms a concave-convex portion 123 at the tip portion in contact with the inserted welding tip 31.

The uneven portion 123 of the cutter 120 has an uneven line groove 31a-1 on the front end surface 31a of the welding tip while tip dressing the welding tip 31, as shown in FIG. 8(b). Formed.

Accordingly, a cross-sectional view having an uneven line groove 31a-1 as shown in (1) is formed on the front end surface 31a of the welding tip.

At this time, the front end surface 31a of the welding tip has a wide cross-sectional area as shown in (2).

In addition, the welding work efficiency is increased by increasing the instantaneous current by increasing the frictional resistance of the contact surface of the aluminum plate to be welded during the welding work using the welding tip after tip dressing.

As described above, the cutter holder assembly 100 for a tip dresser according to the present invention has the configuration of the pushing unit 130 to prevent the chip (ch) cut during the tip dressing operation from being fused to the cutter 120 to be fixed. In addition, the air flow is guided through the air inflow path formed through the wing part 140 so that the chip can be discharged smoothly.

In addition, it is possible to prevent reverse assembly due to the shape characteristic of the cutter 120, and increase welding efficiency by the welding tip processed by the shape characteristic of the tip.

The present invention described above is limited to the above-described embodiments and the accompanying drawings because various substitutional modifications and changes can be made within the scope of the present invention to those of ordinary skill in the art. It does not become.

Claims

In the cutter holder assembly for a tip dresser including a holder unit 110 that rotates according to a setting and a cutter 120 integrally mounted on the holder unit 110 to perform a tip dressing operation for the welding tip 31 ,

The cutter 120 forms a pin hole 121 penetrating through one side;

As the pin hole 121 is protrudingly mounted and elastically moved, the chip (ch) that was pushed to the rear by the cut chip (ch) during the tip dressing operation, and then moved back to the original position after the tip dressing operation, and was attached to the cutter (120). Cutter holder assembly for a tip dresser, characterized in that comprising a pushing portion 130 for pushing the cutter 120 to the outside.
The method of claim 1,

The pushing unit 130,

A ball pin 131 mounted in the pushing part mounting hole 115 of the holder part 110 to penetrate the pin hole 121 and protrude an end thereof,

Cutter holder assembly for a tip dresser, characterized in that comprising an elastic member (133) that is seated in the pushing unit mounting hole (115) to provide an elastic force to the ball pin (131).
The method of claim 2,

The pushing unit 130,

A cutter holder assembly for a tip dresser, characterized in that it further comprises a tanning bolt (132) coupled to the pushing part mounting hole (115) to support the elastic member (133).
The method of claim 2,

The ball pin 131,

A ball pin protrusion 131a is formed to protrude along the outer circumferential edge of the end positioned in the pushing unit mounting hole 115 to prevent separation from the front by being caught by the jaw formed at the end of the pushing unit mounting hole 115 Cutter holder assembly for a tip dresser, characterized in that.
The method of claim 1,

The holder part 110,

Cutter holder assembly for a tip dresser, characterized in that it further comprises a plurality of wing portions 140 formed to protrude upward and having a set gap (a) along the upper edge.
The method of claim 5,

The wing part 140,

A cutter holder assembly for a tip dresser, characterized in that a plurality of them have a radial shape in a curved shape from the inside to the outside.
The method of claim 1,

The cutter 120,

Cutter holder for a tip dresser, characterized in that the length (b1) of the upper cutter blade (124a) and the length (b2) of the lower cutter blade (124b) are different from each other to prevent reverse mounting to the holder part (110) Assembly.
The method of claim 1,

The cutter 120,

Cutter holder assembly for a tip dresser, characterized in that the uneven portion 123 is formed at a tip portion in contact with the inserted welding tip 31.