KR101724483B1

KR101724483B1 - Chip collecting apparatus for use in resistance welding tip dresser

Info

Publication number: KR101724483B1
Application number: KR1020150094822A
Authority: KR
Inventors: 김명진; 김종식; 신철희
Original assignee: 주식회사휴비스
Priority date: 2015-07-02
Filing date: 2015-07-02
Publication date: 2017-04-10
Also published as: KR20170004455A

Abstract

The present invention relates to a chip collecting apparatus for a resistance welding electrode tip dresser that collects chips generated by cutting abrasion without scattering in a dresser for abrading an electrode tip for resistance welding, And a flexible material having a front end overlapped with the flow of compressed air is provided so as to be in contact with the flow of the compressed air, Seal the entrance securely with flexible material.

Description

TECHNICAL FIELD [0001] The present invention relates to a chip collecting apparatus for a resistance welding electrode tip dresser,

The present invention relates to a chip picking apparatus for a resistance welding electrode tip dresser which picks up chips generated according to cutting abrasion in a dresser for abrading an electrode tip for resistance welding.

Spot welding is performed by overlapping two panels and determining a target spot to be spot welded. By applying pressure to both electrodes while flowing a high current locally between the electrodes, both sides of the spot are respectively returned to a pair of electrodes. Which is a kind of resistance welding.

Since the electrode for spot welding is worn or contaminated by repeating welding, a portion where the pressure is directly applied to the panel is constituted by a replaceable electrode tip. When the welding is repeated a predetermined number of times, the tip of the electrode tip is connected to the tip dresser TIP DRESSER). When the length of the electrode tip is reduced to a predetermined length, it is replaced.

However, when the electrode tip is polished by the tip dresser, the chip is cut away and the chip is scattered in all directions, which not only deteriorates the working environment but also may be on the electrode tip, can do.

As a technique for solving the problem of deterioration of the working environment and the problem of deterioration of the welding quality, the chip scattering prevention container according to the public utility model No. 20-1995-0017061 is constructed so as to surround the portion where cutting and polishing are performed, The dust collecting cover according to the Japanese Patent Application No. 10-1019571 comprises a blade portion having an incision end and an inlet through which the electrode tip enters, do. Thus, it was possible to reduce scattering of chips to the outside.

However, when the flexible material is used, a part of the chip may be discharged to the outside through the center of the flexible material in a state where the electrode tip is externally pulled out in the structure and the installation method. In case of using the wing portion, So that the chip can be collected at a low rate. Further, the chip has a structure for accumulating the chip on the bottom of the cover, so that the chip can be left without being collected.

KR 20-1995-0017061 A Jul. KR 10-1019571 B1 2011.02.25.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for preventing chips from flowing out through an entry port through which an electrode tip enters, And an object of the present invention is to provide a chip collecting apparatus for a resistance welding electrode tip dresser which can prevent the chip from flowing out in consideration of the flow direction of the compressed air and improve the chip collection rate.

To achieve the above object, the present invention provides a compressor for blowing air, comprising: a compressor; A receptacle (300) for collecting chips; The electrode tips 11a and 11b are mounted on the tip dresser 20 so as to receive the upper and lower portions of the bobbins 21a and 21b for polishing the pair of electrode tips 11a and 11b in the tip dresser 20, The inlet port 131a and the outlet port 131b are formed in the upper and lower sides for introducing the leading end of each of the discharge ports 11a and 11b toward the bites 21a and 21b, respectively. The outlet port 121 connected to the compressor 200, The chip 122 is formed on both sides with the bytes 21a and 21b interposed therebetween and the chips generated as the electrode tips 11a and 11b are polished with the bits 21a and 21b are collected in the receptacle 300 (100); And a controller (400) for intermittently controlling the compressed air injected into the air outlet (121) by the compressor (200). The tips (142, 152) The first flexible material 140 and the second flexible material 150 of the flexible material overlapping at the entry port 131b intercept the lower entry port 131b inside the lower jig 100, The first flexible material 140 is directed toward the discharge port 122 and the first flexible material 140 is directed toward the tuyeres 121. When the tip 142 of the first flexible material 140 reaches the tip 152 of the second flexible material 150, And the upper surface of the second substrate is overlapped.

The first flexible material 140 and the second flexible material 150 may be brushes.

The first flexible member 140 is pushed by the electrode tips 11a and 11b to rotate inside the lower jig 100 to receive an elastic restoring force toward the lower entry opening 131b.

The first flexible material 140 and the second flexible material 150 are flexible sheets.

The first flexible material 140 and the second flexible material 150 may be formed by cutting at least one of the cutouts 140a and 150a cut radially from the ends corresponding to the center of the lower entry opening 131b And at least one electrode tip 11b is opened and bent at the cutouts 140a and 150a.

The blowing port 121 is formed in a direction passing over the inner bottom surface of the housing 100. A blowing pipe 111 installed downward toward the upper bite 21a is connected to the compressor 200, The controller 400 can control the blowing of the compressed air by providing the intermittent valves 211 and 221 to the pipes 210 and 220 connecting the blower pipe 111 and the blower pipe 111 to the compressor 200, 11a and 11b are blown through the air blowing pipe 111 while the polishing cloths 21a and 21b are polished by the cutting tools 21a and 21b and the compressed air is blown through the air blowing port 121 after polishing is completed, 221).

The controller 400 alternately opens and closes the two intermittent valves 211 and 221 during polishing to alternately blow the compressed air through the blowing pipe 111 and the blowing port 121. [

According to the present invention configured as described above, the pair of flexible materials is made of a flexible material that intercepts the entry port and can be bent into the flexible material, and the tip is mounted on the entry port so as to overlap with each other, The gap is substantially closed with the flexible material even when the electrode tip enters the inside, and the flexible material stably blocks the entry port even if the compressed air passes through the inside. Therefore, The chip can be collected without any leakage, thereby greatly improving the collection rate.

1 is a perspective view showing a state where a chip collecting device for a resistance welding electrode tip dresser according to an embodiment of the present invention is mounted on a tip dresser 20. Fig.
2 is a perspective view showing the inside of the housing 100 in a state where the upper housing 110 is opened in the chip collecting apparatus for a resistance welding electrode tip dresser according to the embodiment of the present invention.
3 is a cross-sectional view of a housing 100 in a chip collection apparatus for a resistance welding electrode tip dresser according to an embodiment of the present invention.
4 is a time chart showing the intermittent timing of the intermittent valves 211, 221, and 231 for interrupting the compressed air injected into the housing 100.
5 is a sectional view of a housing 100 for explaining an operation state of a chip collecting apparatus for a resistance welding electrode tip dresser according to an embodiment of the present invention.
FIG. 6 is a time-of-engagement time chart showing that the intermittent valves 211, 221, and 231 can be interrupted in a different manner.
7 is a perspective view of a housing 100 (FIG. 7) showing that the first flexible material 140 and the second flexible material 150 can be constituted of a flexible sheet in the chip collecting apparatus for a resistance welding electrode tip dresser according to another embodiment of the present invention ).
8 is a view showing a state in which the first flexible material 140 and the second flexible material 150 are separated in Fig.
9 is a sectional view of a housing 100 equipped with a first flexible material 140 and a second flexible material 150, which are made of a soluble sheet.
Fig. 10 is a state diagram when the electrode tip is polished in the housing 100 shown in Fig. 9; Fig.
11 is an interior view of the housing 100 showing that the first flexible material 140 and the second flexible material 150 can be made of a single flexible sheet.
Fig. 12 is a view showing a state in which the first flexible material 140 and the second flexible material 150 are separated from each other in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of a tip collecting apparatus for a resistance welding electrode tip dresser according to an embodiment of the present invention, which is mounted on a tip dresser 20. FIG. 3 is a front sectional view of the housing 100. As shown in Fig.

First, the welding gun and the tip dresser 20 will be described.

Although the overall structure of the welding gun is not shown in the drawings, it is a technique well known in the field of resistance welding, so that a brief description will be given.

The welding gun is configured such that electrode tips 11a and 11b are detachably fixed to the ends of a pair of shanks 10a and 10b that face each other in such a manner that their longitudinal center axes coincide with each other, And the gap between the electrode tips 11a and 11b is adjusted by adjusting the gap. In the case of welding, two panels to be welded are placed between the electrode tips 11a and 11b to adjust the distance between the electrode tips 11a and 11b so that the electrode tips 11a and 11b are fitted to the panel. In this state, A current is supplied and pressed between the tips 11a and 11b. Here, since the tip end of the electrode tips 11a and 11b which are closed to the panel determines the quality of the welding, the tip end faces of the electrode tips 11a and 11b are cut and polished into a circle having an appropriate diameter, The section is polished to have an appropriate surface. In addition, since the tip of the electrode tip may be worn, damaged or contaminated as the welding is repeated, the tip dresser 20 is used to cut and polish the wire so as to have a proper shape every time the wire is welded about 200 times.

The tip dresser 20 includes a fixed frame 24 that stands up, a motor 23 fixed to the fixed frame 24 via a vibration absorbing mechanism 25 to absorb vibrations generated during cutting and polishing, And the upper and lower ends of the extended end portions of the bite housing 22 are provided respectively at the upper portion of the motor 23 and the lower portion of the bite housing 22, And bites 21a and 21b to be rotated in accordance with the rotation angle.

Thus, the pair of electrode tips 11a and 11b facing each other can be cut by the upper and lower bobbins 21a and 21b.

The present invention is an invention for collecting chips coming off from the electrode tips 11a and 11b at a high collection rate as the electrode tips 11a and 11b are cut and polished by the upper and lower bosses 21a and 21b.

1 to 3, a chip collecting apparatus for a resistance welding electrode tip dresser according to an embodiment of the present invention includes a housing 100 mounted on a tip dresser 20, a housing 100, and pipes 210, 220, And a controller 400 for controlling the blowing operation of the compressor 200, the receptacle 300, and the compressor 200 connected to the compressor 200, 230, and 310, respectively.

The compressor 200 is a means for blowing compressed air into the interior of the housing 100 through the pipes 210, 220, and 230.

The inner space of the receptacle 300 communicates with the interior of the housing 100 through the pipe 310 so that the electrode tips 11a and 11b are cut and polished by the bite 21a and 21b inside the housing 100 So that chips generated by cutting or grinding at the electrode tips 11a and 11b are swept into the compressed air and introduced into the inside. The receptacle 300 is formed with a plurality of holes covered with a mesh 320 around a portion connected to the pipe 310 so that the compressed air introduced into the receptacle 300 is discharged through the holes, 320 so as to accumulate in the inner space.

The receptacle 300 is provided with a sensor for detecting the amount of chips accumulated in the internal space, and transmits an alarm signal to the controller 400 when chips are stacked at a preset height. Here, the sensor may be configured as an optical sensor that is installed at a predetermined height position of the receptacle 300 and detects stacking of chips.

The housing 100 is mounted to the bite housing 22 of the tip dresser 20 so as to receive therein the bite 24 in the bite housing 22, And an upper housing 110 which covers the upper portion of the bite housing 22 and is fixed to the lower housing 120. Here, the lower housing 120 is fastened to the bite housing 22 by a bolt fastening to a screw hole used at the time of assembling the bite housing 22 to facilitate detachment without changing the structure of the bite housing 22, When the upper housing 110 is superimposed on the lower housing 120, the upper housing 110 can be opened to open the lid by fixing one side of the upper housing 110 with the hinge and fixing the other side of the lower housing with the fastening hook and the fastening ring. . When the upper housing 110 and the lower housing 120 are stacked, the remaining structure except for the upper and lower portions where the bites 21a and 21b are located has a sealing structure and the end of the bite housing 22 And the compressed air can flow through the upper and lower portions of the bite housing 22 because there is a clearance space between the inner surface and the upper and lower surfaces of the bite housing 22. [

At the positions where the bites 21a and 21b are located, the entry holes 131a and 131b for passing the electrode tips 11a and 11b through the electrode tips are formed one above the other. Here, the peripheral structures of the entrance ports 131a and 131b are formed of a film 130 of a soluble material capable of bending. That is, the film 130 having the entry ports 131a and 131b is installed. The incisions 132 are formed in four directions with respect to the entry ports 131a and 131b so that the entry ports 131a and 131b can be opened.

According to a specific embodiment, a portion to be formed with the entry ports 131a and 131b and a side surface portion adjacent to the entry port 131a and 131b are widely cut and removed, and then covered with the film 130 formed with the entry ports 131a and 131b.

The incision end 132 is extended to the entrance 131a or 131b and extends to the side of the housing so that the electrode tips 11a and 11b are slid in the horizontal direction through the incision 132 of the side, (131a, 131b). Although the cut-out width of the cut-out end 132 is shown in the drawing, it is necessary to make the cut-out width small so that the chip does not pass through the cut-out end. In the drawing, the incision end is extended to the side of the housing, but may not extend to the side to prevent the outflow of the chip.

The film 130 may be made of, for example, a transparent soft film made of PVE, and has high elastic properties to restore the film 130 even before it is opened by the incision 132. [

The tuyere 121 and the outlet 122 are formed on both sides of the housing 100 with a space between the upper and lower entrances 131a and 131b where the bites 21a and 21b are located, Is formed on the side surface of the lower housing 120 and the discharge port 122 is formed on the bottom surface or the side surface of the lower housing 120. A blowing pipe 111 extends horizontally from the inside of the upper housing 110 to be connected to a side surface of the lower housing 120 formed with the tuyeres 121 and then mounted on the upper surface of the bite housing 22 And is directed downward toward the upper bite 21a.

The air outlet 121 and the air blowing pipe 111 are connected to the compressor 200 by pipes 210 and 220 to blow the compressed air supplied from the compressor 200 into the interior of the housing 100. That is, the compressed air injected into the tuyeres 121 is blown into the lower side of the bite housing 22 (lower clearance space where the lower bite is located), then discharged through the discharge port 122, The compressed air to be injected is blown toward the upper bite 21a and then discharged through the discharge port 122. [

Each of the pipes 210 and 220 connected to the compressor 200 through the blowing port 121 and the blowing pipe 111 is provided with one or more intermittent valves 211 and 221 for interrupting passage of the compressed air Respectively.

The discharge port 122 leads to the receptacle 300 by the piping 310 to guide the air discharged through the discharge port 122 into the receptacle 300. The inner pipe 122a for blowing the compressed air toward the inside of the pipe 310 connected to the receptacle 300 may have an outer diameter smaller than the inner diameter of the discharge port 122 And is fitted in the discharge port 122. The inner pipe 122a is connected to the compressor 200 by a pipe 230 having an intermittent valve 231 so that the compressed air injected from the compressor 200 is supplied to the pipe 310 and may be interrupted by the intermittent valve 231. [ The inner tube 122a is for smoothly blowing the air inside the housing 100 into the receptacle 300. [

According to the present invention, the lower entrance 131b of the upper and lower entrance ports 131a and 131b is blocked inside the lower window 100 by the first and second flexible members 140 and 150.

As shown in the sectional view of FIG. 3, the upper and lower entrances 131a and 132b are located above and below the housing 100, respectively. However, referring to FIG. 2, the lower entry port 132b may include a first flexible material 140 inside the housing 100, And the second flexible member 150, it is not seen even if the upper housing 110 is opened. According to the embodiment of the present invention, since the film 130 having the lower entrance 131b and the incision 132 is also mounted on the lower portion of the housing, the incision 132 is also inserted into the first flexible member 140 and the second flexible member 150, as shown in Fig. Although not shown in the drawings, the cut end 132 is not covered, but it may be covered with a flexible material up to its extended cut end 132, or may not extend the cut end 132 laterally. The film 130 provided with the lower entry port 131b is installed to cover the outer surface of the housing 100 so that the film 130 and the first and second bridges 140 and 150 and the lower entry port 131b, However, the space may be eliminated by providing the film 130 so as to cover the inner surface of the housing 100.

The first flexible material 140 and the second flexible material 150 are made of a flexible material having elasticity capable of bending and returning to the original state when bent by an external force. In the embodiment shown in Fig. 2 According to the present invention.

More specifically, the first flexible material 140 and the second flexible material 150 are formed by bundling one end of a bundle of fibers having a larger number of bundles in the width direction than the height direction by holders 141 and 151, The tip ends 142 and 152 of the other side untouched by the holders 141 and 151 can be blown by the wind or can be wiped off the surface of a specific object (electrode tip in the present invention).

The first flexible material 140 and the second flexible material 150 constructed as described above are arranged so that the ends 142 and 152 of the first and second flexible materials 140 and 142 face the ends 142 and 152 of the first flexible material 140, 151 overlap with the front end 152 of the second flexible member 150 so that the overlapping ends 142 and 152 of the second flexible member 150 cross the center of the lower entrance 131b, (Not shown). Of course, the holders 141 and 151 of the first flexible material 140 and the second flexible material 150 may be fixed to the lower housing 120 or fixed to the lower side of the film 130 fixed to the lower housing 120 .

The first flexible material 140 and the second flexible material 150 are arranged in a line on an extension line connecting between the blowing port 121 and the discharge port 122 so that the second flexible material 150 is discharged through the discharge port 122 The first flexible material 140 is directed toward the air outlet 121. Therefore, even if compressed air is blown through the air outlet 121, the first flexible material 140 is not spilled.

When the holder 141 of the first flexible member 140 is installed on the lower housing 120, the hinge 143 passing through the center of the holder 141 in the longitudinal direction is used as a rotation axis, The holder 141 can be lifted up to the inside of the housing 100 while being positioned on the inner bottom of the housing 100. When the torsion spring 144 rotates inside the housing 100, And receive a force in a direction to block the lower entrance 131b.

When the electrode tip 11b is inserted into the housing 100 through the lower entry opening 131b, the first flexible material 140 is pushed by the tip end surface and the outer peripheral surface of the electrode tip 11b, And the second flexible member 150 is fixed to the inner bottom surface of the lower housing 120 so that only some of the fibers pushed by the electrode tip 11b in the bundle of fibers are bent, 11b. &Lt; / RTI >

When the electrode tip 11b is lowered and taken out to the outside from the inside of the housing 100, the first flexible material 140 also rotates toward the lower entry opening 131b as the electrode tip 11b descends, 11b. Therefore, chips that may have been adhered to the electrode tips 11b, which are generated during the cutting and polishing process, are swept away to the bottom surface of the housing. The second flexible member 150 sweeps the leading end surface of the electrode tip 11b by the force to return to the original state in the direction in which some of the fibers pushed and bent by the electrode tip 11b are straightened.

The controller 400 controls the compressor 200 and the intermittent valves 211, 221, and 231 in conjunction with the operation of the tip dresser 20 so that chips generated when the electrode tips 11a and 11b are polished To be collected in a collection bin (300).

FIG. 4 is a time chart showing the time of interruption for explaining the flow of compressed air by the intermittent speed of the intermittent valves 211, 221, and 231, FIG. 5 is a view for explaining an operation state according to the time chart 100).

4, the motor 23 is operated from the time t1 before the electrode tips 11a and 11b enter the interior of the housing 100, and the electrode tips 11a and 11b are connected to the housing 100, The motor 23 is stopped at a time point t2 after the time point t2 'when the motor 23 is driven out of the motorcycle 100.

Then, the intermittent valves 211, 221, and 231 are controlled in accordance with the bite rotation period t1-t2 by the operation of the motor 23.

More specifically, an intermittent valve 211 for intermittently blowing air through the air blowing pipe 111 is opened for a period including a bite rotation period (t1-t2), so that compressed air is supplied to the upper bite 21a through the blowing pipe 111, As shown in FIG. And opens the intermittent valve 221 which intermittently blows air through the air outlet 121 for a predetermined period of time (t4-t5) after the injection of compressed air through the air blowing pipe 111. [ An intermittent valve 231 for interrupting the blowing of the compressed air through the discharge pipe 122a mounted on the discharge port 122 is provided with intermittent valves 211 and 212 for intermittently blowing air through the blowing duct 111 and the blowing port 121, 221 interlocked so as to be opened simultaneously with the opening operation.

That is, since the pair of electrode tips 11a and 11b are taken by the upper and lower bites 21a and 21b one by one and the compressed air is sprayed toward the upper bite by the blowing tube 111 during the cutting and polishing, And a part of the air is sucked by the flow of the compressed air and is discharged to the receptacle 300 through the discharge port 122. [ After completion of cutting and polishing, compressed air is blown into the housing 100 through the air outlet 121 to discharge the chips accumulated on the inner bottom of the housing 100 to the receptacle 300 through the outlet 122. At this time, the compressed air flowing into the housing 100 through the air outlet 121 passes over the inner bottom surface of the housing 100, and the lower portion of the position where the lower portion 21b abrades the cutting surface (that is, 2 flexible material) is directed to the discharge port 122 while being diesel or bypassed, so that the chips accumulated on the inner bottom surface are discharged to the discharge port 122 without leaving any chips.

Accordingly, the chips generated during the cutting and polishing of the electrode tips 11a and 11b can be collected in the receptacle 300 without leaving the inside of the housing 100.

Since the first flexible material 140 and the second flexible material 150 are attached to the lower entry opening 131b and the electrode tips 11a and 11b are introduced into the housing 100 to perform cutting and polishing, The chip is prevented from flowing out to the outside through the lower entry opening 131b while the tips 11a and 11b are withdrawn to the outside of the housing 100 and the chips stacked in the housing 100 are collected in the receptacle 300, It is possible to greatly increase the chip collection rate.

5, a pair of electrode tips 11a and 11b enter the housing 100 through upper and lower entrance ports 131a and 131b and the electrode tips 11a and 11b are inserted into the upper and lower bites 21a and 21b, The first flexible material 140 and the second flexible material 150 brush the tip of the electrode tip from the bottom in the lower entry opening 131b. At this time, the first flexible material 140 is pushed into the inside of the mirror housing 100 at the electrode tip, but is rotated by the torsion spring 144, and on the opposite side, the fiber bundle of the second flexible material 150 It fits into the tip and spreads some fibers upwards. Even though the electrode tips 11a and 11b are cut and polished and the chip is scattered in the housing 100 by injecting the compressed air through the air blowing pipe 111, the gap between the lower entrance 131b and the electrode tip 11b Since the first flexible material 140 and the second flexible material 150 are in a film state, the chip can be prevented from flowing out.

In the case of the upper entry opening 131a, the chip is scattered in such a manner that it is dispersed in four directions, and the chip receives a force to descend due to its own weight, so that even if there is a slight gap between the chip and the upper electrode tip 11a, There is virtually no spillage.

4, the period (t1-t3) during which the compressed air is blown into the housing 100 through the blowing pipe 111 is a time t3 (t3) at which a predetermined time has elapsed after the time t2 So that compressed air is blown through the blowing pipe 111 for a predetermined time (t2'-t3) even at the time t2 'at which the electrode tips 11a and 11b are discharged to the outside of the housing 100. This is to drop a chip, which may remain in the upper bite 21a, to the inner bottom of the housing 100.

Even if the compressed air is blown into the blowing pipe 111 during the ejection of the electrode tips 11a and 11b to the outside as described above, the first flexible material 140 is pressed down by the torsion spring 144, Like state of the ashes 150, the gap between the lower entry opening 131b and the electrode tip 11b is closed. At the same time, a chip which may be adhered to the electrode tip 11b is also swept away from the electrode tip 11b and accumulated on the bottom of the housing without any external leakage.

Since the tip end 142 of the first flexible material 140 overlaps the tip end 153 of the second flexible material 150 at the moment when the electrode tip 11b that has entered the lower side is ejected to the outside, 131b are blocked by the first flexible material 140 and the second flexible material 150. [

In this state, compressed air is blown through the air blowing port 121. At this time, the tip end 142 of the first flexible material 140 is always positioned higher than the tip end 152 of the second flexible material 150 And the air outlet 121 through which the compressed air flows is backed up, so that the air is not let out by the compressed air. That is, in the state where the lower entry port 131b is closed, the chips accumulated on the bottom of the housing are discharged to the discharge port 122 and collected in the receptacle 300, so that the chips can be collected without flowing out.

On the other hand, the lower bite 21b mounted on the bottom surface of the bite housing 22 does not blow compressed air into the blowing pipe 111, but chips generated by the lower bite 21b spontaneously fall down and accumulate on the bottom of the housing, Even if a minute amount remains, it is swept away by the flow of compressed air blown through the air outlet 121.

FIG. 6 is a time chart for explaining another control method for the intermittent valves 211, 221, and 231. FIG.

The difference from the time chart shown in Fig. 4 is that the compressed air is not continuously blown into the upper bite 21a through the blowing pipe 111, intermittently stopped, Lt; RTI ID = 0.0 > air. &Lt; / RTI > In other words, compressed air is blown in alternately in the blowing pipe 111 and the blowing port 121.

In the period during which the electrode tips 11a and 11b are cut and polished, by repeating a series of operations of stacking the chips generated in the upper bite 21a on the bottom of the housing and collecting the stacked chips, .

Compressed air blown into the housing through the air outlet 121 passes through a space between the inner bottom surface of the housing 100 and the bottom surface of the bite housing 22 while the electrode tip enters the housing to perform cutting and polishing, The chip stacked on the bottom is discharged through the discharge port 122. The compressed air is directed to the first flexible material 140 and the first flexible material 140 is introduced into the miller housing 100 at the electrode tip, However, since the flow of the compressed air blowing through the air outlet 121 is inclined and tilted, it is pressed against the compressed air, and is further adhered to the electrode tip. That is, the chip can be collected while preventing the outflow of the chip.

4 and 6, since the operation of blowing the compressed air toward the upper bite and the operation of blowing the compressed air along the bottom surface of the housing are not performed at the same time, The pressure drop can be prevented. Therefore, the chip generated at the time of cutting and polishing can be reliably dropped from the bite, and the dropped chip can be surely discharged and collected.

On the other hand, by bridging or rotating the first flexible material 140 and the second flexible material 150, the brushing function can be enhanced. For example, a ring, which surrounds the lower entry opening 131b at the inner bottom surface of the housing 100 but is rotatable around the boundary where the film 130 is fixed, is provided at a position deviated from the film 130, And the holders 141 and 151 of the flexible material 140 and the second flexible material 150 are provided. The first flexible material 140 and the second flexible material 150 can be rotated by providing a rotating means for rotating the ring within a predetermined angle range. Of course, it is preferable that the rotation angle is limited so that the tip end 142 of the first flexible member 140 does not face the air outlet 121 even if the first flexible member 140 is pivoted,

On the other hand, the controller 400 is connected to the monitoring device for monitoring the welding condition in association with the tip dresser 20 and the controller for controlling the welding gun, so that the chip picking operation state by intermittent control of the intermittent valve, The sensor 330 signal of the sensor 330 may be transmitted to the monitoring device. Thus, it is possible to remotely monitor the state of the chip collecting apparatus for a resistance welding electrode tip dresser according to the present invention.

FIGS. 7 to 10 are views for explaining a chip collecting apparatus for a resistance welding electrode tip dresser according to another embodiment of the present invention, in which the first flexible material 140 and the second flexible material 150 are formed into a flexible sheet (FIG. 7), the first flexible material 140 and the second flexible material 150 are separated from each other (FIG. 8), the first flexible material 140 Sectional view (FIG. 9) of the housing 100 equipped with the first flexible material 150 and the second flexible material 150 and a sectional view (FIG. 10) of the housing 100 when polishing the electrode tip in the housing 100 .

7 to 10, the first flexible material 140 and the second flexible material 150 are made of a flexible sheet. Here, the flexible sheet is exemplified by a flexible PVC film. The flexible sheet may be made of a material that can be bent more easily than a relatively small external force as compared with the film 130, or may be made of the same material But may be made of a plate material having a relatively thinner thickness than the film 130.

The first flexible material 140 and the second flexible material 150 are connected to each other at points corresponding to the center of the lower entrance 131b at the ends 142 and 152 overlapping with each other (A position at which the center point of the tip of the electrode tip passes when the electrode tip passes through the electrode tip)), and at least one cutout portion 140a, 150a cut radially by a predetermined length. Here, the predetermined length is at least larger than the radius of the electrode tip, and more precisely, it is larger than the sum of the overlapping width and the radius of the electrode tip in consideration of mutually overlapping ends.

The first flexible member 140 has one cutout portion 140a directed toward the direction of the air outlet 121 and the second flexible member 150 is connected to the discharge port 122. In this embodiment, And a plurality of cutouts 140a and 150a may be provided, respectively.

In addition, although the cutouts 140a and 150a shown in the drawing have a predetermined width, the cutouts 140a and 150a are formed in order to make the drawings more easily recognizable. In practice, the cutouts 140a and 150a are not opened. do. That is, the cutouts 140a and 150a are formed by cutting a line on the flexible sheet and cutting the cut along the line.

The first flexible material 140 and the second flexible material 150 are fixed to the inner surface of the lower housing 120 on the side of the edge of the film 130, .

7 and 8, the film 130 is mounted so that the upper surface thereof lies on the same plane as the inner side bottom surface of the lower housing 120.

9, the first flexible material 140 and the second flexible material 150 are separated from the underlying film 130 when the electrode tip is not inserted into the lower entry opening 131b, It does not stretch downward.

10, the first flexible material 140 and the second flexible material 150 are inserted into the housing 100 while the electrode tip passes through the lower entry opening 131b, The electrodes 140a and 150b are bent upward to be bent upwardly, thereby maintaining the state of being closely contacted to the outer circumferential surface of the electrode tip, and permitting penetration of the electrode tip.

In addition, when the electrode tip is withdrawn to the outside of the housing 100, the tip end of the first flexible material 140 overlaps the tip end of the second flexible material 150 and returns to the state shown in Fig.

By having the double structure in which the first and second flexible members 140 and 150 are provided in addition to the film 130 having the lower entry opening 131b for permitting passage of the electrode tip and the clearance being reduced as much as possible, The 1,2 flexible materials 140 and 150 seal the lower entrance 131b formed in the film 130 by closing the gaps even when the electrode tip enters the inside of the housing 100, The lower entrance 131b can be closed because the upper portion of the upper door 131 is not supported by the film 130 in the state of being withdrawn.

11 is an internal view of a housing 100 showing that the first flexible material 140 and the second flexible material 150 can be constituted by one flexible sheet, and Fig. 12 is an internal view of the first flexible material 140 and the second flexible material 150, The flexible material 140 and the second flexible material 150 are separated from each other.

11 and 12, a flexible material blocking the lower entry opening 131b is not separated as the first flexible material 140 and the second flexible material 150 but is formed of a single sheet, and the lower entry opening 131b And a plurality of cutouts 140a and 150a radially formed around a portion corresponding to the center of the cutout 140a. Accordingly, when the electrode tip penetrates, a plurality of cutouts 140a and 150b are opened to allow penetration of the electrode tip, and at the same time, the outer peripheral surface of the electrode tip can be swept away.

Even if the first flexible material 140 and the second flexible material 150 are not separated and constituted by a single flexible sheet, the lower part is supported by the film 130 to maintain a stable state, 131b can be sealed and the gap can be closed when the electrode tip is penetrated. However, since wind is blown from the air outlet 121 as described above, the first flexible material 140 and the second flexible member 150, and the ends are overlapped.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, . &Lt; / RTI > Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

10a, 10b: Shanks 11a, 11b: electrode tip
20: Tip dresser 21a, 21b: Byte 22: Byte housing
23: motor 24: fixed frame 25: vibration absorption mechanism
A: chip picking device
100: Housing
110: upper housing 111:
120: lower housing 121: blowing port 122:
122a: internal tube
130: Film 131a, 131b: Entry port 132: Cutting edge
140: first flexible member 141: holder 142: tip
143: Hinge 144: Torsion spring
150: second flexible member 151: holder 152:
200: compressor 210, 220, 230: piping 211, 221, 231:
300: receptacle 310: piping 320: mesh
330: Sensor
400: controller

Claims

A compressor 200 for blowing air;
A receptacle (300) for collecting chips;
The electrode tips 11a and 11b are mounted on the tip dresser 20 so as to receive the upper and lower portions of the bobbins 21a and 21b for polishing the pair of electrode tips 11a and 11b in the tip dresser 20, The inlet port 131a and the outlet port 131b are formed in the upper and lower sides for introducing the leading end of each of the discharge ports 11a and 11b toward the bites 21a and 21b, respectively. The outlet port 121 connected to the compressor 200, The chip 122 is formed on both sides with the bytes 21a and 21b interposed therebetween and the chips generated as the electrode tips 11a and 11b are polished with the bits 21a and 21b are collected in the receptacle 300 (100); And
A controller (400) for intermittently controlling compressed air injected into the air outlet (121) by the compressor (200);
And an electrode tip holder for holding the electrode tip,
The blowing port 121 is formed in a direction passing over the inner bottom surface of the housing 100 and a blowing pipe 111 installed downward toward the upper bite 21a is connected to the compressor 200. The blowing port 121 And valves 221 and 222 are provided in the pipes 210 and 220 that connect the blowing pipe 111 and the blowing pipe 111 to the compressor 200 so that the blowing of the compressed air can be controlled,
The first flexible material 140 and the second flexible material 150 made of flexible material overlapping the ends 142 and 152 at the lower entry opening 131b are inserted into the lower entry opening 131b from the inside of the lower case 100, The second flexible member 150 faces the discharge port 122 and the first flexible member 140 faces the blowing port 121. The tip end 142 of the first flexible member 140 is connected to the second flexible member 140. [ To overlap the tip 152 of the base 150,
The controller 400 causes the compressed air to be blown alternately in the blowing pipe 111 and the blowing port 121 while the electrode tips 11a and 11b are polished by the bite 21a and 21b, And controls the intermittent valves (211, 221) to blow compressed air through the air outlet (121).

The method according to claim 1,
Wherein the first flexible material (140) and the second flexible material (150) are brushes.

3. The method of claim 2,
Wherein the first flexible member 140 is pushed by the electrode tips 11a and 11b to rotate inside the lower jig 100 and to receive an elastic restoring force toward the lower entrance 131b. Chip picking device.

The method according to claim 1,
Wherein the first flexible material (140) and the second flexible material (150) are flexible sheets.

5. The method of claim 4,
The first flexible material 140 and the second flexible material 150 may be formed by cutting at least one of the cutouts 140a and 150a cut radially from the ends corresponding to the center of the lower entry opening 131b Wherein at least one of the electrode tips is bent and bent at the cutout portions when the electrode tip is passed.

delete