WO2021029586A1

WO2021029586A1 - Tip dresser

Info

Publication number: WO2021029586A1
Application number: PCT/KR2020/010212
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: KR102064543B1

Abstract

The present invention relates to a tip dresser and, more specifically, to a tip dresser, which prevents chips generated during a tip dressing operation from accumulating in a cutter holder assembly, facilitates the collection of discharged chips, and can easily determine whether the cutter holder assembly rotates forward/backward, thereby enabling work efficiency and convenience of use to increase. To this end, the tip dresser of the present invention comprises: the cutter holder assembly having a pushing part; a forward/backward rotation determiner having an encoder plate and a sensor part; and a chip collector.

Description

Tip dresser

The present invention relates to a tip dresser, and more particularly, to prevent chips generated during a tip dressing operation from accumulating inside a cutter holder assembly, to facilitate collection of discharged chips, and to easily determine whether the cutter holder assembly rotates forward or backward. It relates to a tip dresser made to increase work efficiency and ease of use by being able to discriminate.

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 discharged through the discharge space 21a of the holder 21 and are being collected.

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

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, the chips fused to the cutter 22 are fixed over time, thereby increasing the defect rate of the tip dressing operation.

In addition, as a result of continuous fusion of chips, a bundle of cut chips may be caught in the discharge space 21a of the holder, resulting in a decrease in the collection rate of the chips, and eventually, the chip in which the discharge space 21a is fused with time. There was a problem that the work efficiency of the entire tip dresser device was deteriorated due to the blockage.

Meanwhile, some of the chips cut during the tip dressing operation are scattered upward or downward in the opening of the cutter holder assembly 20.

In order to collect and process the scattered chips while preventing scattering of such scattered chips, an air injection unit is installed on the upper part of the cutter holder assembly 20 as necessary.

In addition, the chips cut according to the pressure and flow of the air injected through the air injection unit are passed through the discharge spaces 21a of the holder and are collected and processed by the chip collector.

However, there is a problem in that air flow to the discharge space of the holder is not well guided because the air injected by the air injection unit hits the upper portion of the rotating holder and is dispersed.

In other words, the cut chips are scattered in all directions by the air injected from the air injection unit, resulting in a problem of lowering the chip collection efficiency.

Meanwhile, in general, the cutter holder assembly performs a tip dressing operation by cutting the end of the drawn welding tip while rotating in one set direction.

For example, when the cutter holder assembly rotates in the forward rotation direction according to the setting, a normal tip dressing operation is performed, and when rotation in the reverse rotation direction, the tip dressing operation is not performed.

On the other hand, according to the setting already, the tip dressing operation is performed while rotating in the forward rotation direction when the tip dresser 10 is installed, and there is no case that the cutter 22 is deliberately rotated in the reverse direction. It was determined whether the tip dressing operation was performed or not by determining the rotation of (10).

However, depending on the setting, the cutter holder assembly 20 of the tip dresser 10 rotates forward and performs a tip dressing operation according to a control signal, but in some cases, reverse rotation may occur.

For example, when installing or repairing the tip dresser 10 device, the operator incorrectly connects the wiring direction inside the motor giving the rotation, or the wiring direction inside the relay box transmitting the control signal is wrong, or the control signal Accordingly, when the internal magnetic sensing of the forward/reverse rotation is defective, the cutter holder assembly 20 of the tip dresser 10 may rotate in reverse rotation.

Typically, a separate protruding dog (not shown) is coupled to the top of the cutter holder assembly 20 so as to check whether or not it rotates, and only whether the proximity sensor 52 of the detection sensor unit 50 senses it and rotates. Discriminate and inform.

Accordingly, the operator cannot clearly know whether the cutter holder assembly 20 has rotated forward or reversely, and only unconsciously checks whether or not it is detected, and if it is in a sensing state, it is recognized that the tip dressing operation has been performed normally.

Therefore, when the cutter holder assembly 20 rotates in the reverse direction, there is a case that the welding tip for which the tip dressing operation has not been performed is again put into the spot welding operation, which inevitably causes a defect in the entire spot welding, and work efficiency It brings about a problem that drops significantly.

Accordingly, these conventional various problems, that is, during the tip dressing operation, the dressing-worked chips (Ch) are fused to the processing cutter 22 of the cutter holder assembly 20 so that they are not aggregated or caught on the discharge space 21a. There is an urgent need to develop a tip dresser, which is removed and collected, and is made to improve work efficiency and ease of use by determining whether the cutter holder assembly 20 is rotated normally.

In addition, there is a need to develop a tip dresser with a simple structure while facilitating collection of chips (ch) passing through the cutter holder assembly 20.

The present invention has been conceived to solve the above-described problems, prevents chips generated during tip dressing from accumulating inside the cutter holder assembly, facilitates collection of discharged chips, and facilitates whether the cutter holder assembly rotates forward or backward. It is an object of the present invention to provide a tip dresser that can be discriminated so as to increase work efficiency and ease of use.

In order to achieve the above object, the tip dresser according to the present invention includes a main body and an upper structure.

And, it comprises a cutter holder assembly and the forward and reverse rotation discrimination body.

The cutter holder assembly is provided in the mounting space of the upper structure and rotates, and the cutter is fastened to the holder and forms a pin hole on one side and performs a tip dressing operation, and a rear surface by the chip cut during the tip dressing operation. It includes a pushing part protruding from the pin hole so as to push and drop the chip attached to the cutter to the outside of the cutter while being pushed back to the original position after the tip dressing operation and to move elastically.

The forward/reverse rotation discriminator includes an encoder plate that rotates by forming a pair of first and second detection units at different positions on both sides and integrally coupled to the upper surface of the cutter holder assembly, and on the top of the encoder plate. It includes a sensor unit that has an interval and is located at a fixed position and sequentially detects the first sensing unit or the second sensing unit according to rotation, and thus determines whether the cutter holder assembly is rotated forward or backward according to the detection sequence of the setting.

On the other hand, the tip dresser of the present invention includes a chip collector body for collecting and processing chips by passing through a collection hole through a collection hole according to the rotation of the holder part constituting the cutter holder assembly under the mounting space of the upper structure.

In a specific embodiment, the pushing part of the cutter holder assembly includes a ball pin mounted in the pushing part mounting hole of the holder part, penetrating the pin hole and protruding at the end, and seated in the pushing part mounting hole to provide elastic force to the ball pin. It comprises an elastic member and a tanning bolt coupled to the pushing unit mounting hole to support the elastic member.

On the other hand, the holder portion of the cutter holder assembly further includes a plurality of wing portions formed to protrude upward with a set interval along the upper edge.

At this time, the wing portion has a radial shape in a shape that is curved to be curved from the inside to the outside.

Meanwhile, the cutter of the cutter holder assembly is characterized in that the length of the upper cutter blade and the length of the lower cutter blade are different from each other to prevent reverse mounting to the holder part.

On the other hand, in one embodiment, the encoder plate of the forward/reverse rotation discriminator has a length on one side and protrudes to extend with respect to the rotation direction to form a first sensing unit, and the outer rim is shorter than the first sensing unit. It protrudes to extend in length to form a second sensing unit.

In addition, the encoder plate has an outer edge having a length on the other side and protrudes to extend in the rotation direction to form a second sensing portion, and the inner edge protrudes to extend to a shorter length than the second sensing portion to form a first sensing portion.

Meanwhile, the chip collector body includes a first plate coupled to a bottom surface of the upper structure under the cutter holder assembly and forming a collection hole communicating with the discharge space of the cutter holder assembly; It is configured to include a tubular main body having a collection chamber to be coupled to the lower portion of the first plate so that the chips freely fall through the collection hole and are collected and passed.

On the other hand, it further includes a second plate in which a through hole having a size including a collection hole is formed between the first plate and the main body as necessary.

In addition, in the tip dresser, the upper structure including the cutter holder assembly is configured to be rotated at a set angle to fix the position.

In one embodiment, for this purpose, the tip dresser includes a plurality of fastening bolts penetrating the main body and fixing the upper structure, and a spring plunger on one side of the upper structure.

As described above, the tip dresser according to the present invention includes a cutter holder assembly including a pushing unit, so that chips cut and agglomerated according to the tip dressing operation are pushed away from the cutter using the pushing unit, so that the chips are fused and not accumulated inside the cutter holder assembly. It has the effect of smoothing the chip discharge to the outside.

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, since the first sensing unit and the second sensing unit at different positions are provided on both sides of each side and include a forward/reverse rotation discriminator that sequentially senses them according to the forward/reverse rotation, the forward or reverse rotation of the cutter holder assembly is included. It has an effect that the operator can clearly know whether the end of the welding tip is normally processed according to the tip dressing operation by checking whether or not.

In addition, chips swept away by the rotating cutter holder assembly freely fall according to the rotation direction and the flow of air, and are collected and processed in the chip collector body, thereby having the effect of collecting chips without additional external power.

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 of a cutter holder assembly applied to a tip dresser according to the prior art during a tip dressing operation.

3 and 4 are perspective and partially exploded perspective views showing an embodiment of a tip dresser according to the present invention.

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

6 and 7 are views showing the structure of the cutter holder assembly applied to the tip dresser according to the present invention and an operating state thereof.

8 is a view showing an embodiment of a cutter constituting the cutter holder assembly applied to the tip dresser according to the present invention.

9 is a view showing a forward/reverse rotation discriminator applied to a tip dresser according to the present invention.

10 is a diagram showing an encoder plate applied to the forward/reverse rotation discriminator according to FIG. 9.

11 is a view showing the flow of the forward/reverse rotation determination control circuit using the forward/reverse rotation discriminator according to FIG. 9.

12 and 13 are an exploded perspective view and a partial cross-sectional perspective view showing a chip collector body applied to the tip dresser according to the present invention.

14 and 15 are schematic views showing the relationship between the chip collector body and the cutter holder assembly applied to the tip dresser according to the present invention.

16 and 17 are schematic views showing the rotation of the superstructure of the tip dresser according to the present invention.

The present invention is in the best form, in the tip dresser comprising the main body (1a) and the upper structure (1b),

A cutter that is provided in the mounting space 11 of the upper structure (1b) and rotates, and is fastened to the holder part (110), and forms a pin hole (121) on one side and performs a tip dressing operation. The chip (ch) attached to the cutter (120) is pushed to the rear by the chip (ch) cut during the tip dressing operation and then moved to the outside of the cutter (120) as it is in its original position after the tip dressing operation. A cutter holder assembly 100 including a pushing part 130 which is mounted to protrude from the pin hole 121 so as to move elastically;

An encoder plate 210 that forms a pair of the first sensing unit 211 and the second sensing unit 212 at different positions on both sides, and integrally coupled to the upper surface of the cutter holder assembly 100 to rotate, The encoder plate 210 has an interval and is fixedly positioned to detect the first sensing unit 211 or the second sensing unit 212 sequentially according to the rotation of the encoder plate 210, so that the detection sequence of the setting is Accordingly, a tip dresser comprising a forward/reverse rotation discrimination body 200 including a sensor unit 220 for determining whether the cutter holder assembly 100 rotates forward or reverse is presented.

Hereinafter, preferred embodiments of the tip dresser 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 side is to indicate a portion having a height with respect to the bottom surface of the tip dresser is installed or a direction thereof, and the lower or lower is to indicate the opposite portion or direction thereof. It will be described as indicated.

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, in the tip dresser 1 according to the present invention, chips (ch) generated during the tip dressing operation do not accumulate inside the cutter holder assembly 100, and the discharged chips can be collected without additional external power. It is easy, and since it is possible to easily determine whether the cutter holder assembly 100 is rotated forward or backward, it is made to increase the efficiency of work and ease of use.

To this end, referring to FIGS. 3 and 4, the tip dresser 1 according to the present invention is fixed to a stand (not shown) at a position to be installed using a fixture 3 provided with a balance spring 2. It is installed, and includes a main body (1a) for accommodating the driving motor therein, and an upper structure (1b) that is coupled to the upper portion of the main body (1a) to accommodate the cutter holder assembly (100) on one side.

The operation and role of the main body 1a and the upper structure 1b are known functions and configurations, and a detailed description thereof will be omitted so as not to obscure the subject matter of the present invention.

In addition, a detailed description of the general role of the cutter holder assembly 100 for cutting the end of the drawn welding tip through a tip dressing operation will be omitted so as not to obscure the subject matter of the present invention.

However, the tip dresser 1 of the present invention constitutes a cutter holder assembly 100 having a holder part 110, a cutter 120, and a pushing part 130 to perform a tip dressing operation, and an encoder plate It is configured to include a forward/reverse rotation discrimination body 200 including 210 and a sensor unit 220.

In addition, a chip collector body 300 is included in the lower portion of the cutter holder assembly 100 to collect and process the chips ch without external power.

In addition, the upper structure 1b constituting the tip dresser 1 is configured to be rotated at a set angle as necessary to change its position and fix it.

A detailed feature of the tip dresser 1 according to the present invention will be described with reference to the drawings.

First, referring to FIGS. 5 to 7 in addition to FIGS. 3 and 4 again, a cutter holder assembly for performing a tip dressing operation for the welding tip 31 that is mounted and inserted into the tip dresser 1 according to the present invention ( 100).

As described above, the tip dresser 1 of the present invention has a main body 1a and an upper structure 1b, and the holder part 110 rotates while being provided in the mounting space 11 of the upper structure 1b. , The cutter 120 is fastened to the holder part 110 and forms a pin hole 121 on one side and performs a tip dressing operation, and the tip dressing is pushed to the rear by the chip (ch) cut during the tip dressing operation. Cutter holder assembly including a pushing part 130 that is protruding from the pin hole 121 so as to push and drop the chip (ch) attached to the cutter 120 to the outside of the cutter 120 while being in its original position after work Includes 100.

At this time, the holder unit 110 is mounted in the mounting space 11 configured on one side of the upper structure 1b of the tip dresser 1, has a shape corresponding to the mounting space, and forms a discharge space 114 on one side. , It includes a body 111 having a seating hole 113 in which the welding tip 31 is inserted and seated at the upper and lower portions, respectively, and an upper plate 112 in the shape of a donut disk is integrally formed on the upper portion of the body 111 Formed by

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.

On the other hand, the cutter holder assembly 100 applied to the tip dresser 1 of the present invention is different from the cutter 120 even after the tip dressing operation due to the fusion of the chips cut by the cutter 120 during the tip dressing operation. It includes a pushing unit 130 to prevent sticking.

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 unit 130 is composed of a ball pin 131 having elasticity and is mounted in the pin hole 121 of the cutter 120.

Specifically, an embodiment of the pushing unit 130 constituting the cutter holder assembly 100 will be described with reference to FIG. 6.

First, the cutter 120 forms a pin hole 121 penetrating through one side, and a pushing part mounting hole at a position corresponding to the pin hole 121 of the cutter 120 in the body 111 of the holder part 110 Form 115.

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 addition, 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 to penetrate the pin hole 121 and the end portion is positioned to protrude.

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.

On the other hand, the ball pin 131 forms a ball pin jaw (131a) to protrude along the edge of the outer circumferential surface of the end located in the pushing portion mounting hole 115, and is caught by the jaw formed at the end of the pushing portion mounting hole 115 to the front. -To prevent separation in the direction of the cutter 120 -.

The operation of the cutter holder assembly 100 including the pushing unit 130 will be described again with reference to FIG. 6.

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.

Meanwhile, referring again to FIG. 7, the cutter holder assembly 100 applied to the tip dresser 1 according to the present invention has a structure including a blade part 140 to more smoothly process the cut chips ch. Has.

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 above-described wing portion 140 is preferably formed to protrude to the upper side of the upper structure (1b) of the tip dresser (1).

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 body 300 to be described later.

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, as 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 inflow path h formed by the wing unit 140, the chip (ch) Can be smoothly discharged.

Meanwhile, referring to FIG. 8, a cutter 120 constituting the holder assembly 100 will be described below.

The cutter 120 is integrally mounted on the holder 110 and directly performs a tip dressing operation for the welding tip 31 that is drawn in from the upper or lower portion.

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.

To this end, the cutter 120 of the present invention has the length (b1) of the upper cutter blade portion (124a) and the length (b2) of the lower cutter blade portion (124b) to prevent reverse mounting to the holder portion (110). Form 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.

Hereinafter, with reference to FIGS. 9 to 11 along with FIGS. 3 and 4 again, a forward/reverse rotation discriminator 200 applied to the tip dresser 1 of the present invention will be described.

As described above, in the tip dresser 1 according to the present invention, it is possible to easily determine whether the cutter holder assembly 100 is performing a tip dressing operation for a welding tip that is normally rotated and inserted. It comprises a rotation discrimination body 200.

Specifically, the forward/reverse rotation discrimination body 200 is configured to include an encoder plate 210 and a sensor unit 220.

First, the encoder plate 210 forms a pair of the first sensing unit 211 and the second sensing unit 212 at different positions on both sides-the left and the right of FIG. 10-respectively, and the cutter holder assembly 100 It rotates by being integrally coupled to the upper plate 112 constituting the upper surface.

In addition, the sensor unit 220 uses a proximity sensor in an embodiment, and has a space on the upper portion of the encoder plate 210 and is a fixed position, so that the first sensing unit 211 or the second sensing unit 212 is rotated. It is determined whether the cutter holder assembly 100 is rotated forward or backward according to the detection sequence of the setting by sequentially sensing.

In other words, depending on whether the sensor unit 220 first detects the first sensing unit 211 rotating according to the setting or the second sensing unit 212 first, the forward rotation or reverse rotation of the cutter holder assembly 100 is performed. Determine whether to rotate.

More specifically, referring to FIG. 10, the encoder plate 210 includes a fastening hole 213a formed in the fastening protrusion 213 formed to protrude inward in a plate shape formed with a hemispherical frame, and the holder part 110 The upper plate 112 is positioned in alignment with the coupling hole 112a and is integrally coupled through the fastening member (F).

At this time, the encoder plate 210 forms a first sensing part 211 by protruding so that the inner rim has a length and extends in the rotational direction on one side of the hemispherical rim-the left side of Fig. 10-and the outer rim is removed. The second sensing part 212 is formed by protruding to extend to a shorter length than the first sensing part 211.

The first sensing unit 211 and the second sensing unit 212 have a set interval g1.

In addition, the encoder plate 210 has a length on the other side of the hemispherical frame-the right side of Fig. 10-and protrudes so as to extend in the rotation direction to form a second sensing unit 212, and the inner rim is a second sensing. The first sensing portion 211 is formed by protruding to extend to a shorter length than the portion 212.

The first sensing unit 211 and the second sensing unit 212 have a set interval g2.

The encoder plate 210 configured as described above is coupled to the upper plate 112 of the holder part of the cutter holder assembly 100 and integrally rotates together in the direction of the setting.

On the other hand, the sensor unit 220, referring to FIG. 9, the cutter holder assembly 100, the upper portion of the fixed position with a gap, each of the first sensing unit 211 formed on the rotating encoder plate 210 ) And the second sensing unit 212 to detect the first sensing unit 211 and the second sensing unit 212 It has a detection sensor 222.

The first detection sensor 223 and the second detection sensor 222 are fixed and positioned at a set position through a sensor fixing part 221.

According to this configuration, the sensor unit 220 corresponds to the first sensing unit 211 or the second sensing unit 212 according to the rotation direction of the encoder plate 210. The detection sensor 222 sequentially detects and determines whether the cutter holder assembly 100 rotates forward or backward according to the detection sequence of the setting.

Whether such a forward or reverse rotation is displayed so that an operator can check it through an alarm unit (not shown) electrically connected to the sensor unit 220.

For example, the alarm unit may be displayed on a display, a lamp may be flashed or displayed through color, and an abnormality may be notified through sound.

Referring again to Figs. 9 to 11, the operation state of the forward/reverse rotation discriminator 200 applied to the tip dresser 1 of the present invention will be described as follows.

Depending on the setting, the first sensing unit 211 of the encoder plate 210 is referred to as B and the second sensing unit 212 is referred to as A.

In addition, the first sensing sensor 222 of the sensor unit 220 for sensing the first sensing unit 211 is referred to as a proximity sensor B, and a second sensing sensor 223 for sensing the second sensing unit 212 is provided. It is called A proximity sensor.

And, it was confirmed that the cutter holder assembly 100 of the tip dresser 1 rotates in the forward direction (normal rotation) when the encoder plate 210 rotates in the left direction in FIG. 10 to perform a normal welding tip dressing operation, When the encoder plate 210 rotates in the right direction, the cutter holder assembly 100 of the tip dresser 1 rotates in the reverse direction (over rotation) to confirm that the tip dressing operation is not performed.

Referring to FIG. 11, the cutter holder assembly 100 rotates to start a tip dressing operation using the tip dresser 1.

And, as the cutter holder assembly 100 rotates, if the proximity sensor B detects B first and then the proximity sensor A detects A, this means that the cutter holder assembly 100 is normally rotating in the forward direction.

It can be seen that the tip dressing operation is normally performed and the welding tip is being processed.

On the other hand, as the cutter holder assembly 100 rotates, if the proximity sensor A detects A and then the proximity sensor B detects B, this means that the cutter holder assembly 100 is abnormally rotating in the reverse direction.

At this time, the alarm unit notifies the manager that the tip dressing operation is not normally performed by rotating in the reverse direction, and the tip dresser 1 stops and stops the tip dressing operation according to the control signal of the setting.

Then, after the manager checks and takes action, the tip dresser 1 starts the tip dressing operation again according to the control signal of the setting, and the forward/reverse rotation discrimination body 200 is again forward and backward of the cutter holder assembly 100. Determine whether to rotate or reverse.

On the other hand, it is preferable to use a proximity sensor for the sensor of the sensor unit 220, but it goes without saying that a position sensor or various other sensors can be applied if it is possible to determine whether the sensor unit rotates forward or backward by detecting the appearance and disappearance of the sensor unit 220 .

Next, referring to FIGS. 12 to 15 together with FIGS. 3 and 4, the chip collector body 300 applied to the tip dresser 1 of the present invention will be described as follows.

The tip dresser 1 according to the present invention collects chips (ch) swept away by the rotation of the holder unit 110 constituting the cutter holder assembly 100 under the mounting space 11 of the upper structure 1b It is configured to include a chip collector body 300 that passes through the hole 311 for collection processing.

In a more specific embodiment, the chip collector body 300 includes a first plate 310 and a main body 330.

At this time, the first plate 310 is integrally coupled to the bottom of the upper structure 1b to the lower portion of the cutter holder assembly 100 through a fastening bolt F, and the discharge space 114 of the cutter holder assembly 100 ) And a collection hole 311 in communication.

In addition, the main body 330 is integrally coupled to the lower portion of the first plate 310 through a fastening bolt, but the collection chamber 331 so that the chips (ch) freely fall through the collection hole 311 and are collected and passed. ).

Meanwhile, a second plate having a through hole 321 having a size including a collection hole 311 between the first plate 310 and the main body 330 to facilitate fastening and coupling as necessary It is configured to further include (320).

On the other hand, the main body 330 has an inclined wall surface 332 positioned at intervals to include one radius of the collection hole 311 and a collection wall surface 333 that extends the other side of the inclined wall surface 332 to form an internal space. ).

The inner space of the inclined wall surface 332 and the collection wall surface 333 forms a single collection chamber 331.

In addition, the collection hole 311 of the first plate 310 has a space and shape of a size that can sufficiently include the discharge space of the upper cutter holder assembly 100, and the inclined wall surface 332 is located at the bottom. The section preferably forms an expansion hole 311a extending laterally so that the chip ch can easily fall toward the inclined wall surface 332.

Preferably, the end portion (d) of the inclined wall surface 332 of the main body 330 has a distance from the first plate 310 and the second plate 320 and is positioned to be separated from the bottom.

On the other hand, the upper surface of the first plate 310 constituting the chip collector body 300 is, as shown in FIG. 15, the chip (ch) bundle can be swept with respect to the bottom surface of the holder portion 110 of the cutter holder assembly 100. It is located with a gap (f) of a certain degree.

Accordingly, the cutter holder assembly 100 acts as a broom while rotating, and the first plate 310 of the chip collector body 300 serves as a dustpan.

Specifically, the process of collecting the chips (ch) generated during the tip dressing operation using the chip collector body 300 applied to the present invention without a special external power is as follows.

First, the tip dresser 1 is cut using a cutter 120 that rotates an end of a welding tip inserted into the cutter holder assembly 100.

At this time, the generated chip (ch) is discharged downward through the discharge space of the cutter holder assembly 100 according to the speed generated while the cutter holder assembly 100 rotates and the flow of air injected through the external air injection unit.

Meanwhile, the chips generated during the tip dressing process are not discharged directly through the discharge space, but are swept away by the rotating force of the cutter holder assembly 100 and rotated by falling on the upper surface of the first plate 310 of the chip collector body 300 Will do.

At this time, the holder portion 110 of the rotating cutter holder assembly 100 is guided by collecting chips (ch) while sweeping the upper surface of the first plate 310 while the bottom surface serves as a broom.

In addition, the induced chip (ch) rotating on the upper surface of the first plate 310 falls downward while passing through the wide section in which the expansion hole 311a of the collection hole 311 is formed.

At this time, the chip (ch) that passes through the space of the collection hole 311 of the portion in which the expansion hole 311a is formed is scattered by the rotating force while being swept by the rotating holder unit 110, and the sprinkled chip is While freely falling through the collection hole 311, it passes through the inclined wall surface 332 constituting the main body 330 of the chip collector 300 to enter the collection chamber 331 and is collected.

Meanwhile, the main body 330 of the chip collector body 300 has a collection hose 50 connected to the rear, and the collection hose 50 communicates with a chip collection container (not shown) to collect and process the collected chips. To be.

As described above, the chip collector body 300 of the present invention uses the rotational force of the rotating cutter holder assembly 100 and the flow of air to collect and process the chips (ch) generated during the tip dressing operation without additional external power. I can.

Meanwhile, in general, the tip dresser 1 is installed so that the cutter holder assembly 100 is positioned in front of the tip dresser stand (not shown), which is a support for supporting the fixture 3.

At this time, there is a problem in that the tip dressing operation cannot be performed when the space to install the tip dresser is narrow, the joint of the robot where the welding gun is installed is short, or when the tip dresser is located at the rear or diagonal of the robot.

Usually, in this case, the entire tip dresser (1)-the body (1a) and the upper structure (1b)-had to be moved and installed.

However, even when attempting to move the entire tip dresser (1) as described above, installation restrictions still remain depending on the safety pencil, welding jig interference, and the installation location of the robot according to the environmental characteristics of the factory, which in turn does not result in tip dressing. There were even cases where it was impossible.

To solve this problem, the tip dresser 1 according to the present invention is an upper structure 1b including a cutter holder assembly 100 for a fixed body 1a, as in FIGS. 3 and 4 and 17 Is rotated at the set angle to change the position and fix it.

Since the upper structure (1b) of the tip dresser (1) can be rotated and installed to change its position according to the installation location, depending on the factory environment, the welding robot can perform the tip dressing operation on the entire 360-degree surface.

In addition, in some cases, the tip dresser 1 of the present invention may perform a sequential tip dressing operation in response to a plurality of welding robots with a single tip dresser.

To this end, in detail, the tip dresser 1 according to the present invention is, in one embodiment, referring to FIG. 16, a plurality of fastening bolts F for fixing the upper structure 1b through the main body 1a, and , It comprises a spring plunger (4) on the upper one side of the upper structure (1b).

The spring plunger 4 is a known function having a conventional known structure, and a detailed description thereof will be omitted.

However, the spring plunger 4 penetrates the upper structure 1b and, although not shown, acts as a brake to prevent the upper structure 1b from rotating by being caught on one side inside the main body 1a.

Accordingly, when the user wants to change the angle of the upper structure 1b of the tip dresser 1, first pull the spring plunger 4 so that the upper structure 1b is rotatable.

Then, after removing the fastening bolt (F) fastened to the main body (1a), rotate the upper structure (1b) in a desired direction, and fasten the fastening bolt (F) again to fix the position.

In addition, the spring plunger 4 is returned to its original position so that the upper structure 1b is not rotated even by external force.

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 tip dresser including the body (1a) and the upper structure (1b),

A cutter that is provided in the mounting space 11 of the upper structure (1b) and rotates, and is fastened to the holder part (110), and forms a pin hole (121) on one side and performs a tip dressing operation. The chip (ch) attached to the cutter (120) is pushed to the rear by the chip (ch) cut during the tip dressing operation and then moved to the outside of the cutter (120) as it is in its original position after the tip dressing operation. A cutter holder assembly 100 including a pushing part 130 which is mounted to protrude from the pin hole 121 so as to move elastically;

An encoder plate 210 that forms a pair of the first sensing unit 211 and the second sensing unit 212 at different positions on both sides, and integrally coupled to the upper surface of the cutter holder assembly 100 to rotate, The encoder plate 210 has an interval and is fixedly positioned to detect the first sensing unit 211 or the second sensing unit 212 sequentially according to the rotation of the encoder plate 210, so that the detection sequence of the setting is Accordingly, a tip dresser comprising a forward/reverse rotation discriminator 200 including a sensor unit 220 for determining whether the cutter holder assembly 100 rotates forward or backward.
The method of claim 1,

Collecting processing by passing the chip (ch) swept away by the rotation of the holder unit 110 constituting the cutter holder assembly 100 under the mounting space 11 of the upper structure 1b through the collection hole 311 Cutter holder assembly for a tip dresser, characterized in that the configuration further comprises a chip collector body (300).
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,

An elastic member 133 that is seated in the pushing part mounting hole 115 and provides an elastic force to the ball pin 131,

A cutter holder assembly for a tip dresser, characterized in that it comprises a tanning bolt (132) coupled to the pushing part mounting hole (115) to support the elastic member (133).
The method of claim 1,

The holder part 110,

It further includes a plurality of wing portions 140 formed to protrude upward and having a set interval (a) along the upper edge,

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 encoder plate 210,

On one side, the inner edge protrudes to extend in the rotational direction with a length to form the first sensing unit 211, and the outer rim protrudes to extend to a shorter length than the first sensing unit 211 to form a second sensing unit. To form (212),

The second sensing unit 212 is formed by protruding the outer rim to the other side to have a length and extending in the direction of rotation, and the inner rim protrudes to extend to a shorter length than the second sensing unit 211 to form a first sensing unit. Tip dresser, characterized in that the plate shape in which (211) is formed.
The method of claim 2,

The chip collector body 300,

A first plate coupled to the bottom surface of the upper structure 1b under the cutter holder assembly 100 and forming a collection hole 311 communicating with the discharge space 114 of the cutter holder assembly 100 ( 310) and,

A tubular main body 330 having a collection chamber 331 is provided so that chips (ch) freely fall through the collection hole 311 and are collected and passed through the collection hole 310 by being coupled to the lower portion of the first plate 310. Tip dresser, characterized in that configured to include.
The method of claim 7,

Tip dresser, characterized in that it further comprises a second plate (320) formed between the first plate (310) and the main body (330) and a through hole (321) having a size including the collection hole (311).
The method of claim 1,

The upper structure (1b) including the cutter holder assembly (100),

Tip dresser, characterized in that it is configured to fix the position by rotating at a set angle.
The method of claim 9,

The tip dresser,

A plurality of fastening bolts (F) penetrating the main body (1a) and fixing the upper structure (1b),

Tip dresser, characterized in that comprising a spring plunger (4) on one side of the upper portion of the upper structure (1b).