JP4772222B2 - Chip dresser for chip dresser - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chip dresser chip recovery device that recovers chip generated when shaping an electrode tip.
[0002]
[Prior art]
Conventionally, an electrode tip used for spot welding or the like is worn (deformed or worn) when the welding operation is repeated. When welding work is performed with a worn electrode tip, the desired welding quality cannot be obtained. Therefore, the electrode tip is periodically shaped (dressed) to maintain the welding quality.
[0003]
For example, in Japanese Patent Laid-Open No. 6-122082, a pair of electrode tips provided at opposite ends of a welding gun are used to clamp the upper and lower surfaces of the shaped body, and then the welding gun is attached to the axis of the electrode tip. There has been disclosed a chip dresser that shapes an electrode tip by swinging to the center and polishing.
[0004]
By the way, in recent years, it has been studied to reuse the chips due to the reduction of material costs and environmental problems. A collecting container is arranged below the shaped body, and the chips collected in the collecting container are recycled. I am trying to use it.
[0005]
However, the chips are likely to be scattered by the relative swinging or rotation of the shaping body and the electrode tip during the polishing operation, and not all the chips are collected in the collection container, and there is a problem that the collection rate is low. .
[0006]
In addition, in order to prevent clogging of the shaped body, when air is blown to the shaped body, the chips are scattered by the blown air, so that the chip recovery rate is further reduced. End up.
[0007]
In general, copper is often used as an electrode tip used for spot welding or the like. However, if an attempt is made to maintain an appropriate welding quality, the frequency of polishing increases, and grinding or polishing waste (chips) of the electrode tip is increased. ) Will increase, it is necessary to increase the recovery rate of chips in order to reduce material costs so that they can be reused effectively.
[0008]
For this reason, various techniques have been proposed in which a chip collection device is attached to the dresser body that holds the shaping body, and chips generated when the electrode tips are shaped by the chip collection device are collected.
[0009]
For example, in Japanese Utility Model Publication No. 3-18067, by attaching a cover body to the dresser body, an air introduction path and an air lead-out path are formed between the cover body and the top and bottom surfaces of the dresser body. Compressed air after driving the shaping body held by the holder is guided to the holder through the air introduction path, and the compressed air that has passed through the holder is connected to the end of the cover body through the air outlet path. A technique is disclosed in which chips generated during chip polishing or grinding are collected in a chip collection container by being guided to a chip collection container.
[0010]
[Problems to be solved by the invention]
Incidentally, in general, the operation of moving the welding gun provided at the tip of the welding robot in the direction of the tip dresser is often stored in advance by teaching.
[0011]
However, as in the prior art described above, when a cover body that collects chips generated during shaping is attached to the dresser body, the positional relationship between the electrode tip and the shaped body is externally applied during teaching. Since it becomes difficult to recognize visually, it is necessary to remove the cover body from the dresser body and perform teaching once, which disadvantageously increases the man-hours required for teaching.
[0012]
In view of the above circumstances, the present invention can easily confirm the positional relationship between the electrode tip and the shaped body during teaching without removing the entire apparatus, and can greatly reduce the man-hours required for teaching. An object is to provide a dresser chip collection device.
[0013]
[Means for Solving the Problems]
To achieve the above purpose Book The invention provides a shaping body for shaping the tip of the electrode tip in the dresser body, covers the periphery of the shaping body with a chip capturing case, and leads the electrode chip to the chip capturing case in the direction of the shaping body In the chip dresser chip collecting device that opens the chip, the chip capturing case is divided into a first case and a second case fixed on both sides of the dresser body, the above At least one case And inside it Surround the entrance An annular space is provided to cover the annular space Formed into a donut shape, Above ring An air nozzle that circulates air along the inner wall of the annular space portion is disposed in the cylindrical space portion, A chip discharge port is provided on the outer wall of the case covering the annular space. It is characterized by that.
[0014]
In such a configuration, the annular space in the case formed in a substantially donut shape is circulated by the compressed air ejected from the air nozzle, and is generated when the tip of the electrode tip is shaped by the shaping body. Since the chips are taken into the air circulating in the annular space, the chips do not scatter from the entrance, and therefore there is no need to shield the entrance. The relative position of the tip and the shaped body can be confirmed.
[0015]
In this case, it is possible to sequentially discharge the chips from the chip discharge port by providing the chip discharge port in the annular space portion of the case formed in the substantially donut shape.
[0040]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 6 show a first embodiment of the present invention. 1 is a perspective view of the chip collecting device, FIG. 2 is a horizontal sectional plan view of the upper case, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. .
[0041]
Reference numeral 1 in FIG. 1 is a welding gun connected to the welding robot. The welding gun 1 is provided with first and second gun arms 2 and 3, and electrode tips 4 and 5 are attached to the tips of both gun arms 2 and 3. It is detachably attached in a state of facing each other. The electrode tips 4 and 5 are arranged on the same axis, and the electrode tips 4 and 5 are relatively close to and separated from each other by the forward and backward movement of at least one of the gun arms 2 and 3.
[0042]
Reference numeral 11 denotes a tip dresser that shapes (dresses) the tips of the electrode tips 4 and 5, and is disposed at a position that does not interfere with the welding operation within the operating range of the welding robot.
[0043]
A holder portion 12 is provided at a tip portion of a dresser body 11 a extending to the side of the chip dresser 11, and a shaping body 13 is rotatably held by the holder portion 12. The shaping body 13 is rotationally driven by a motor 14 suspended from the dresser body 11a. The tip of the electrode chips 4 and 5 is polished or ground on the lower surface and the upper surface of the shaping body 13 to have a predetermined shape. The concave cutters 13a and 13b that can be shaped are provided.
[0044]
On the other hand, reference numeral 21 denotes a chip capturing case. The chip capturing case 21 is suspended from the lower surface of the dresser body 11a, and covers a portion where the holder portion 12 is exposed at the upper end. A lower case 22 and an upper housing 23 as a second case that is attached to the front end portion of the upper surface of the dresser body 11a and covers the periphery of the holder portion 12 exposed on the upper surface.
[0045]
The lower case 22 is formed by processing a molded product made of a non-ferrous metal, a resin, or the like, or a thin steel plate, and a lower arm entrance 22a for allowing the first gun arm 2 to enter is opened on the front surface. . Further, a chip guide surface 22b is formed at a lower portion of the lower case 22 so as to converge downward, and a chip discharge port 22c is formed at the lower end of the chip guide surface 22b.
[0046]
A shielding member 24 is disposed at the lower arm entrance 22a. The shielding member 24 is composed of a pair of brush portions 25 and 26 disposed opposite to the left and right of the lower arm entrance 22a, and the brushes 25a made of nylon or the like provided on the brush portions 25 and 26, respectively. The root of 26a is screwed to the edge of the lower arm entrance 22a.
[0047]
The tips of the brushes 25a and 26a of the brush portions 25 and 26 are brought into contact with each other at substantially the center of the lower arm entrance 22a, thereby shielding the lower arm entrance 22a. In addition, since the shielding member 24 is for preventing the chips generated when shaping the electrode tips 4 and 5 from scattering from the lower arm entrance 22a to the outside, an airtightness is required. is not.
[0048]
Further, the open end of the chip collection container 27 is suspended from the chip discharge port 22 c via a suspension bolt 28. The chip collection container 27 is preferably lightweight. For example, the upper part of a plastic bottle may be cut and the lower side may be used as the chip collection container 27.
[0049]
On the other hand, the tip of the dresser main body 11a is formed in a circular shape, and a holder portion 12 is provided at substantially the center of curvature thereof. The upper housing 23 is formed in a substantially donut shape, and a flange portion 23a is formed at the lower end of the upper housing 23 so as to come into contact with the circular front end surface of the dresser body 11a. Has been.
[0050]
Further, the inner surface of the upper housing 23 that is folded back to the inside has an upper arm entrance 23 b, and the center of the upper arm entrance 23 b is substantially coincident with the axis of the holder portion 12. The lower end of the upper arm entrance 23b is opposed to the upper part of the holder portion 12, and the upper arm entrance 23b and the upper housing 23 are disposed through a gap between the lower end surface and the surface of the dresser body 11a. The annular space part 23c formed in is communicated. Further, as indicated by a one-dot chain line in FIG. 2, since the minimum diameter of the upper arm entrance 23b is formed to be slightly larger than the diameter of the holder portion 12, the shaping body 13 is passed from above through the upper arm entrance 23b. Directly visible.
[0051]
Further, an upper chip discharge port 23d is formed outside the annular space 23c, and the upper chip discharge port 23d communicates with the upper portion of the lower case 22 via the duct 30 (see FIG. 5). .
[0052]
Further, an air distributor 31 is fixed in the middle of the dresser body 11a, and an air tube extending from an air pipe (not shown) disposed as factory equipment at the rear end of the air distributor 31. 32 is connected, while the first air nozzle 33 and the second air nozzle 34 are connected to the front surface.
[0053]
The tip of the first air nozzle 33 is directed to the shaping body 13 that passes through the upper housing 23 and is held by the holder portion 12, while the tip of the second air nozzle 34 passes through the upper housing 23. It is directed in the direction along the inner wall of the annular space 23c.
[0054]
Next, the operation of the present embodiment having the above configuration will be described. When teaching the welding robot at the time of shaping, a pair of electrode tips 4 and 5 provided at the tip of the welding robot set in the teaching mode are held by the holder portion 12 of the dresser body 11a. It guides to the direction of the shaping body 13 which is. At this time, since the shaping body 13 can be directly seen from above through the upper arm entrance 23b opened in the center of the upper housing 23, the electrode tip 5 attached to the tip of the second gun arm 3 is Since it can be easily guided onto the shaped body 13 and the axis center of the electrode tip 5 can be accurately matched with the axis center of the shaped body 13 by visual observation, workability is good.
[0055]
The electrode tip 4 attached to the tip of the first gun arm 2 is arranged coaxially with the electrode tip 5 attached to the tip of the second gun arm 3, so that the axis of the electrode tip 4 is By making the heart coincide with the axis of the shaping body 13, the axis of the electrode tip 4 attached to the first gun arm 2 is necessarily coincident with the axis of the shaping body 13.
[0056]
And when teaching at the time of shaping is completed in a predetermined manner, the welding robot is moved to separate the welding gun 1 from the chip capturing case 21 and to wait at a predetermined position.
[0057]
Next, the shaping (dressing) work of the electrode tips 4 and 5 will be described. The shaping body 13 held by the holder portion 12 of the dresser body 11a is rotationally driven by a motor. Further, compressed air is supplied to an air distributor 31 fixed to the dresser body 11a through an air tube 32 connected to an air pipe of factory equipment, and this compressed air is supplied to the air distributor 31. Are distributed to the first air nozzle 33 and the second air nozzle 34 connected to each other, and are discharged from both of the air nozzles 33 and 34, respectively.
[0058]
At the time of shaping, first, the pair of gun arms 2 and 3 provided on the welding gun 1 are moved according to an operation taught in advance in the direction of the dresser body 11a with a predetermined gap therebetween.
[0059]
Then, both the gun arms 2 and 3 are brought close to the front surface of the lower case 22, the first gun arm 2 is passed through the brushes 25 a and 26 a to enter the lower case 22, and the second gun arm 3 is moved to the upper housing 23. Let it face above.
[0060]
Thereafter, the axis of the electrode tip 5 provided at the tip of the second gun arm 3 is caused to face the central axis of the shaping body 13 provided in the holder portion 12 provided in the dresser body 11a. At this time, since the electrode tip 5 and the electrode tip 4 provided at the tip of the first gun arm 2 are arranged coaxially, the electrode tip 4 also faces the central axis of the shaped body 13. The
[0061]
Further, both gun arms 2 and 3 are moved to bring both electrode tips 4 and 5 relatively close together. Then, the second gun arm 3 descends in the direction of the upper arm entrance 23b opened in the upper housing 23, passes through the upper arm entrance 23b, and attaches the electrode tip 4 provided at the tip thereof. It is made to contact | abut to the cutter 13b provided in the upper surface of the shaping body 13. FIG. At the same time, the electrode tip 4 provided at the tip of the first gun arm 2 is brought close to the cutter 13a provided on the lower surface of the shaping body 13 from the lower surface of the dresser body 11a.
[0062]
When the electrode chips 4 and 5 are brought closer to each other, the electrode chips 4 and 5 are brought into contact with the cutters 13a and 13b provided on the lower surface and the upper surface of the shaped body 13, respectively. The shaped body 13 is clamped by 4 and 5. Then, since the shaping body 13 is rotationally driven by the motor 14, the tips of the electrode chips 4 and 5 are shaped.
[0063]
Further, since the compressed air is blown from the first air nozzle 33 to the cutter 13b side of the shaping body 13, the chips generated on the cutter 13b side flow downward through the gap of the shaping body 13. And blown off to the annular space 23c side of the upper housing 23.
[0064]
In the annular space portion 23c, a circulating flow is generated by the compressed air discharged from the second air nozzle 34, and the chips blown off in the annular space portion 23c are taken into the annular flow and It goes around the space 23c. And it moves to the outside gradually by the centrifugal force at that time, and it falls to the lower case 22 side through the duct 30 from the upper chip discharge port 23d opened to the outside of the annular space 23c.
[0065]
On the other hand, the chips generated when the electrode tip 4 is shaped by the cutter 13a exposed to the lower case 22 side and the chips dropped into the lower case 22 through the duct 30 are the lower case 22. It is dropped toward the bottom inside. At this time, since the lower arm entrance 22a is shielded by the pair of opposed brushes 25a, 26a, chips do not scatter from the lower arm entrance 22a to the outside.
[0066]
As a result, most of the chips in the lower case 22 are dropped toward the bottom, and the dropped chips are guided in the direction of the chip discharge port 22c along the chip guide surface 22b, and this chip discharge port It accumulates in the chip collection container 30 suspended below 22c.
[0067]
Then, when the shaping of the electrode tips 4 and 5 is completed, the welding robot is operated to move the first and second gun arms 2 and 3 away from the dresser body 11a by the reverse operation to that at the time of entry. Prepare for spot welding.
[0068]
Further, when the amount of chips accumulated in the chip collection container 30 reaches a predetermined amount or periodically, the chips accumulated in the chip collection container 30 are collected and reused.
[0069]
As described above, in the present embodiment, the shaped body 13 held by the holder portion 12 is directly visually recognized from above through the upper arm entrance 23b opened at the center of the upper housing 23 covering the upper surface of the shaped body 13. Therefore, when teaching the welding robot, alignment can be performed while visually confirming the positional relationship between the electrode tip 5 provided at the tip of the second gun arm 3 and the shaped body 13. Therefore, workability is good.
[0070]
Furthermore, the chips generated when the electrode tip 5 is shaped by the cutter 13b are blown off to the annular space portion 23c side by the compressed air discharged from the first air nozzle 33, and the blown chips are discharged into the annular space. Since the inside of the portion 23c is taken into the circulating air that is circulated by the compressed air discharged from the second air nozzle 34, it is discharged from the upper chip discharge port 23d through the duct 30 to the lower case 22 side. Further, the chips are hardly scattered from the upper arm entrance 23b, and the chips can be collected efficiently.
[0071]
In this case, the duct 30 may be directly connected to the chip collecting container 27 as shown in FIG.
[0072]
7 to 9 show a second embodiment of the present invention. 7 is a front view of the chip collecting device, FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. 7, and FIG. 9 is a plan view of FIG.
[0073]
In the chip capturing case 41 shown in the present embodiment, the tip of the dresser main body 11a is inserted into the upper part of the chip capturing case 41, and the front end surface thereof is screwed to the front inner wall of the chip capturing case 41. In addition, the lower arm entrance 41a that is opened on the front surface of the chip capturing case 41 and into which the first gun arm 2 enters is shielded by an air curtain.
[0074]
That is, the air nozzles 42 arranged on both sides of the lower arm entrance 41a are connected to the air pipe of the factory equipment through the air tube 43, the Y-shaped branch pipe 44, and the air conduit 45 connected to the air pipe. Compressed air is supplied, and compressed air is discharged in a direction opposite to each other from discharge holes 42a formed on the opposing surfaces of the air nozzles 42 at predetermined intervals to generate an air curtain. The lower arm entrance 41a is shielded by an air curtain.
[0075]
The upper arm entrance 41b formed on the upper surface of the chip capturing case 41 is covered with a cap-shaped elastic shielding member 46 made of rubber or the like, and its outer periphery is prevented by a ring clip 48. Has been. The shielding member 46 has, for example, a small-diameter hole formed in the center, and slits are radially formed from the hole to the outer circumferential direction, and allows the electrode tip 5 entering from the substantially central part to be allowed by elastic deformation.
[0076]
Further, a chip guide surface 41c is formed in a tapered shape at the bottom of the chip capturing case 41 so as to converge downward, and a chip discharge port 41d is formed at the lower end thereof, below the chip discharge port 41d. A chip collection container 49 is installed. Note that the chip collection container 49 may be suspended from the chip discharge port 41d as in the first embodiment.
[0077]
According to the present embodiment, since the lower arm entrance 41a through which the first gun arm 2 enters is shielded by the air curtain, the chip capturing case passes through the lower arm entrance 41a when teaching. Since the tip of the first gun arm 2 entering the inside 41 and the electrode tip 4 attached to the tip can be easily seen from the outside, the axis of the electrode tip 4 is the axis of the shaping body 13. Can be matched exactly.
[0078]
Further, when the tips of the electrode tips 4 and 5 are shaped, the chips scattered to the upper surface side of the dresser body 11a are dropped from both sides of the dresser body 11a toward the bottom of the chip capturing case 41, and the dresser body 11a The chips scattered from the bottom side are dropped as they are.
[0079]
At that time, since the lower arm entrance 41a is shielded by the air curtain generated by the compressed air discharged from the air nozzle 42, the chips do not scatter to the outside from the lower arm entrance 41a. Most of the chips can be accumulated in the chip collection container 49.
[0080]
FIG. 10 is a perspective view of a chip collection device according to the third embodiment of the present invention. The chip capturing case 51 according to the present embodiment includes a lower case 52 that covers the holder part exposed on the bottom surface side of the dresser body 11a, and an upper housing 53 that covers the holder part exposed on the top surface of the dresser body 11a. The lower case 52 has a lower arm entrance 52a into which the first gun arm 2 enters and protrudes in a hollow shape, and a lower surface of the lower arm 52a has a chute surface 53b inclined downward. A chip guide surface 53c provided continuously with the lower end of the lower case 52 is inclined toward the chip discharge port 53d of the lower case 52.
[0081]
On the other hand, the upper housing 53 is formed in a dome shape and covers the holder portion 12 (see FIG. 2) provided in the dresser body 11a. In the center of the upper housing 53, an upper arm entrance 53a into which the second gun arm 3 enters is opened. Reference numeral 54 denotes an air chamber, to which an air tube 43 connected to an air pipe of a factory facility and an air nozzle 33 directed to the shaping body 13 (see FIG. 2) held at the holder portion 12 are connected. ing.
[0082]
In such a configuration, since the lower arm entrance 52a into which the first gun arm 2 enters is projected forward in the shape of a hollow, the electrode tips 4 and 5 provided at the tips of the gun arms 2 and 3 are shaped. The chips generated at that time are not easily scattered to the outside from the lower arm entrance 52a, and the lower end of the lower arm entrance 52a communicates with the chip guide surface 53c via the chute surface 53b. The chips scattered to the lower arm entrance 52a side are dropped onto the chute surface 53b and slid down to the chip guide surface 53c side along the chute surface 53b. It can be recovered efficiently. Further, since only the lower arm entrance 52a is opened, the structure is simple and the maintenance cost can be reduced.
[0083]
Note that the chips generated when shaping the electrode tip 5 provided at the tip of the second gun arm 3 are air gaps between the holder 12 and the shaping body 13 by the air ejected from the air nozzle 33. Is dropped to the lower case 52 side.
[0084]
11 and 12 show a fourth embodiment of the present invention. Here, FIG. 11 is a perspective view of the lower case, and FIG. 12 is an enlarged view of a main part of FIG.
[0085]
This embodiment is a modification of the shielding member 24 that shields the lower arm entrance 22a, which is adopted in the first embodiment. In the shielding member 24 employed in this embodiment, a pair of opposed brushes 25a, 26a. The stop holes 61 formed in the brackets 25b and 26b for holding the base portions of the brackets are formed in an L shape. Usually, as shown in FIG. 12 (a), the tips of the brushes 25a and 26a facing each other are formed. Are fixed by bolts 62 so that the long holes 61a formed on the outer sides of the retaining holes 61 formed in the brackets 25b and 26b are fixed.
[0086]
On the other hand, at the time of teaching, after the brackets 25b and 26b are lifted along the vertically long hole 61b of the stop hole 61, the brushes facing each other along the horizontally long hole 61c continuous to the vertically long hole 61b. The opposing surfaces of 25a and 26a are moved away from each other, and a gap 63 is formed between the opposing end surfaces of the brushes 25a and 26a as shown in FIG.
[0087]
As a result, the electrode tip 4 attached to the tip of the first gun arm 2 entering the lower case 22 can be directly seen from the outside through the gap 63, and the teaching work can be performed smoothly. it can. Moreover, since the space | gap part 63 can be formed, without removing the brush parts 25 and 26, handling property is good.
[0088]
FIG. 13 is a perspective view of the lower case according to the fifth embodiment of the present invention. This embodiment is a modification of the shielding member 24 that shields the lower arm entrance 22a, which is employed in the first embodiment. In the shielding member 24 employed in this embodiment, a pair of opposed brush portions 25, 26 is composed of brush pieces 25 'and 26' as a unit divided into three parts in the vertical direction. Each of the brush pieces 25 'and 26' is composed of a common part. Therefore, the brush pieces 25 'and the brush pieces are not to mention rotation of the brush pieces 25' (or 26 '). Interchanging with 26 'is also possible.
[0089]
By configuring the brush portions 25 and 26 with the three brush portion pieces 25 'and 26', for example, at the time of teaching, at least one brush portion without removing all the brush portion pieces 25 'and 26'. By simply removing the pieces 25 ′ and 26 ′, the inside of the lower case 22 can be easily visually recognized, and the workability is good.
[0090]
Further, since the approach path of the first gun arm 2 is always constant at the time of shaping, warping and sag are likely to occur only on the brushes 25a and 26a at specific parts. Further, by dividing each brush part 25, 26 into three parts, the life of the brush parts 25, 26 is relatively increased by rotating the brush part pieces 25 ', 26' periodically or at predetermined intervals. Can be extended. Alternatively, the cost of parts can be reduced by replacing only the brush pieces 25 'and 26' where warpage and sag occur with new brush pieces 25 'and 26'. The number of divisions of the brush portions 25 and 26 is not limited to three divisions, and may be two divisions or four divisions or more.
[0091]
FIG. 14 is a perspective view of a chip collection device according to the sixth embodiment of the present invention. In the fifth embodiment described above, only the brush part pieces 25 'and 26' in which the brushes 25a and 26a are warped or sag are obtained by dividing the brush parts 25 and 26 constituting the shielding member 24 into a plurality of parts. However, in this embodiment, the brushes 25a and 26a are likely to warp and sag due to the forward and backward movement of the first gun arm 2 in the present embodiment. Compressed air discharged from the tip of the air nozzle 65 is blown against the part, and the warp and sag generated in the brushes 25a and 26a due to this compressed air is suppressed as much as possible.
[0092]
In the present embodiment, the air nozzles 65 are arranged in two stages on the left and right sides, and the discharge ports of the air nozzles 65 are directed to areas where warpage and sag are likely to occur near the joints of the brushes 25a and 26a. I am letting.
[0093]
A base portion of the air nozzle 65 is rotatably connected to an air conduit 45, and the air conduit 45 is connected to an air tube 43 connected to an air pipe of a factory facility via a branch pipe 66. In addition, the air conduit 45 is a partition line generated when the chip capturing case 41 is molded with a mold, or in sheet metal processing, on a hook portion 41f formed on a protruding portion 41e such as a flange portion formed as a fastening portion, It is detachably attached. In addition, a stop hole 61 similar to that shown in FIG. 12 is formed in the brackets 25b and 26b that hold the base portions of the pair of opposed brushes 25a and 26a.
[0094]
When teaching is performed, the air conduit 45 is removed from the hook portion 41f, the air nozzle 65 is retracted to both sides, and then the bolts 62 that fasten the brackets 25b and 26b are slightly loosened. Similarly, the brush portions 25 and 26 are moved to both sides to form a gap portion 63 (see FIG. 12B) between the opposing surfaces of the brushes 25a and 26a. Check while checking.
[0095]
On the other hand, during normal shaping, the air nozzle 65 is rotated around the base so that the compressed air discharged from the discharge port is blown to the portions where the brushes 25a and 26a are warped or sag. Adjust to.
[0096]
As described above, in this embodiment, in addition to the fourth embodiment, the compressed air is blown from the obliquely outward to the portion where the brushes 25a and 26a are likely to warp and sag, thereby causing the warp and heel. Since generation | occurrence | production of dripping was suppressed, the replacement cycle of the brush parts 25 and 26 can be extended, and a maintenance cost can be reduced correspondingly.
[0097]
FIG. 15 is a perspective view of a chip collection device according to the seventh embodiment of the present invention. In the present embodiment, the base portions of the pair of opposed brushes 25 a and 26 a constituting the shielding member 71 are held by a frame body 71 a formed in a frame shape, and the frame body 71 a is opened on the front surface of the lower case 22. A guide frame 72 having a U-shaped cross section is disposed opposite to both side edges of the lower arm entrance 22a, and a shielding member 71 is inserted into the guide frame 72 from below so as to freely advance and retract.
[0098]
The vertically moving operation of the shielding member 71 is performed by an actuator 74 such as an air cylinder that is connected to a rod 73 that holds the lower end of the frame 71a. That is, at the time of teaching, the shielding member 71 is lowered along the guide frame 72 by the operation of the actuator 74 to open the lower arm entrance 22a.
[0099]
After the teaching is completed, the actuator 74 is operated again to raise the shielding member 71 along the guide frame 72. The shielding member 71 closes the lower arm entrance 22a.
[0100]
According to the present embodiment, since the entire lower arm entrance 22a can be exposed by sliding the entire shielding member 71, the inside of the lower arm 22a can be easily visually recognized from the outside inside the lower case 22. And teaching work can be performed smoothly. Furthermore, since the shielding member 71 is slid through the actuator 74, the shielding member can be opened in synchronization with the teaching mode setting of the welding robot, and semi-automated teaching can be realized.
[0101]
FIG. 16 is a perspective view of a chip collection device according to the eighth embodiment of the present invention. The present embodiment is a modification of the above-described seventh embodiment. The shield member 71 can be inserted into and removed from the guide frame 72 from above, and a common screw insertion hole for the guide frame 72 and the frame 71a. The shielding member 71 is screwed to the lower case 22 with a fastener (not shown) such as a bolt inserted from the front with respect to 72a and 71b.
[0102]
In the present embodiment, no power is required to slide the shielding member 71, so that the structure is simplified and can be manufactured at low cost.
[0103]
FIGS. 17 and 18 show a ninth embodiment of the present invention. Here, FIG. 17 is a perspective view of the chip collection device, and FIG.
[0104]
This embodiment is a modification of the above-described eighth embodiment, and the end surface 71c of the frame body 71a is placed in the opposite direction in the guide frame 72 that passes through one side of the frame body 71a constituting the shielding member 71. When a leaf spring 75 which is an example of an urging means for pushing to the side is disposed and both sides of the shielding member 71 are inserted into the guide frame 72 from above, the leaf spring 75 presses the end surface 71c of the frame body 71a in the opposite direction, The shielding member 71 is held by the guide frame 72.
[0105]
According to the present embodiment, since the shielding member 71 is held by the guide frame 72 by the urging force of the leaf spring 75, bolt tightening as shown in the eighth embodiment is not necessary, and the shielding member 71 is inserted and removed. Becomes easier and workability is improved.
[0106]
19 and 20 show a tenth embodiment of the present invention. Here, FIG. 19 is a front view of the chip collection device, and FIG. 20 is a front view of the chip collection device with the shielding member removed and the upper housing opened.
[0107]
In the present embodiment, the frame body 76a of the shielding member 76 is formed in a lid shape, and hooks of a well-known patch-on lock 77 as an example of a locking means are provided at a total of four positions on both sides of the frame body 76a. 77b is fixed, and the patch lock main body 77a is fixed to the corresponding position on the side surface of the lower case 22. Then, the latch member 77c provided in the patchon lock body 77a is locked to the hook 77b, thereby fixing the shielding member 76 to the front surface of the lower case 22.
[0108]
One end of a base plate 78a of an upper housing 78 provided on the upper surface of the dresser body 11a is supported by the dresser body 11a through a hinge 79 as an example of a rotation support means so as to be opened and closed. The hook 77b of the patchon lock 77 is fixed to the other end. Further, a patchon lock main body 77a is fixed to a portion corresponding to the hook 77b of the dresser main body 11a, and the latch 77c provided on the patchon lock main body 77a is locked to the hook 77b, whereby the upper housing 78 is fixed to the dresser main body 11a. Fixed. FIG. 19 shows a state in which the patch lock 77 is unlocked.
[0109]
In such a configuration, during teaching, the patchon lock 77 to which the shielding member 76 is fixed is unlocked, the shielding member 76 is removed from the lower case 22, and the lower arm enters as shown in FIG. The mouth 22a is opened. Then, after the teaching is completed in a predetermined manner, the shielding member 76 is attached to the front surface of the lower case 22 via the Patchon lock 77, and a normal shaping operation is performed. Since it is only necessary to retrofit the patch and lock 77, the manufacture becomes easy.
[0110]
By the way, the electrode tip attached to the tip of the gun arm may be detached from the gun arm due to the influence of external force or the like during shaping. If the electrode tip attached to the gun arm facing the lower case 22 is removed, it is dropped from the chip discharge port 22c, so that it can be easily removed, but it is attached to the gun arm facing the upper housing 78. When the electrode tip is removed, it remains in the upper housing 78 and is difficult to remove.
[0111]
In such a case, as shown in FIG. 20, the Patchon lock 77 that locks the base plate 78a of the upper housing 78 is unlocked, the base plate 78a is opened around the hinge 79, and is opened on the upper surface of the dresser body 11a. By exposing the holder portion 12 (see FIG. 2), the electrode tip can be easily taken out. Moreover, since the holder part 12 can be exposed easily, replacement | exchange of the shaping body 13 becomes easy and maintainability improves. Further, by opening the upper housing 78, teaching can be performed on the basis of the shaped body 13 exposed on the upper surface side of the dresser body 11a.
[0112]
FIG. 21 is a perspective view of a chip collection device according to the eleventh embodiment of the present invention. The present embodiment is a modification of the above-described tenth embodiment, in which one side of the shielding member 76 is rotated to one side of the chip capturing case 41 via a hinge 81 which is an example of a rotation support means. By freely supporting, the shielding member 76 can be freely opened, and the open end can be locked to the chip capturing case 41 via the patch lock 77.
[0113]
Since the shielding member 76 can be freely opened, the shielding member 76 can be easily opened during teaching, and workability is improved.
[0114]
FIGS. 22 and 23 show a twelfth embodiment of the present invention. Here, FIG. 22 is a perspective view of the chip collection device, and FIG. 23 is a cross-sectional plan view of the XXIII portion of FIG.
[0115]
In the present embodiment, the brackets 25b and 26b that hold the base portions of the brush portions 25 and 26 that constitute the shielding member 86 are in a neutral position with respect to the case bracket 41g that protrudes forward from both side surfaces of the chip capturing case 41. It is held via a return spring 91 for returning to the position.
[0116]
That is, as shown in FIG. 23A, the back surface of the bracket 26b is rotatably supported by the case bracket 41g via a hinge 87 which is an example of a rotation support means. The hinge 87 has a pivot 87a and a main body 87b rotatably supported by the pivot 87a. The main body 87b is divided into a predetermined number. The main body 87b is alternately fixed to the support plate 88 protruding from the back surface of the bracket 26b and the case bracket 41g. The opposite brush portion 25 has the same configuration and is supported by the opposite case bracket 41g. Accordingly, the brush portions 25 and 26 are supported by the case bracket 41g so as to be rotatable in the front-rear direction around the hinge 87.
[0117]
Further, a lever 89 is fixed to a main body 87b of a hinge 87 to which a bracket 26b (25b) for holding a base portion of the brush 26a (25a) is connected. The lever 89 is inserted into the case bracket 41g, and a return spring 91 is continuously provided at the end thereof. The return spring 91 includes a pair of neutral springs 92a and 92b disposed on both side surfaces of the lever 89. The lever 89 always returns to the neutral position by the balance of the urging forces of the neutral springs 92a and 92b. It is energized to let you.
[0118]
Accordingly, the entire brush portion 25 or 26 can be simply rotated by simply pressing the brush portion 25 or 26 from the front to the back. For example, when teaching, the brush portion 25 or 26 can be rotated. By gently pressing, the lower arm entrance (not shown) opened in the front surface of the chip capturing case 41 can be exposed, and the tip of the gun arm that has entered the chip capturing case 41 can be easily It can be visually recognized.
[0119]
And if an operator cancels | releases the pressing force with respect to the brush part 25 or 26, since it is automatically returned to a neutral position with the urging | biasing force of a pair of neutral spring 92a, 92b, handling property is good.
[0120]
Furthermore, at the time of normal shaping, the gun arm pushes the pair of opposed brushes 25a and 26a to try to enter the inside of the chip capturing case 41. At that time, the reaction force when the brushes 25a and 26a are deformed is relatively strong. In this case, the entire brush portions 25 and 26 are slightly rotated by the return spring 91 and lightly made. Therefore, the brushes 25a and 26a are not greatly deformed, and the occurrence of warpage and sag is suppressed, and durability is improved. Can be improved.
[0121]
In this case, for example, as shown in FIG. 23B, the return spring 91 may be configured by a tension spring that pulls the lever 89. Further, as shown in FIG. 3C, the lever 89 itself may be constituted by a leaf spring-like return spring 91. Further, the hinge 87 itself may be a spring hinge having a function of returning to the neutral position.
[0122]
24 and 25 show a thirteenth embodiment of the present invention. Here, FIG. 24 is a plan view of the chip collection device, and FIG. 25 is a sectional view taken along the line XXV-XXV in FIG. In the figure, only the upper housing 96 is described, and the description of the lower case is omitted.
[0123]
In the above-described tenth embodiment, the upper housing 78 is supported so as to be freely openable with respect to the dresser body 11a. However, in the present embodiment, the upper housing 96, which is the second case, is provided with a base plate 96a, The main body 96b is divided into a housing main body 96b that abuts and is fixed to the base plate 96a.
[0124]
That is, a clasp 97 protrudes from the upper surface of a base plate 96a fixed to the dresser main body 11a, while a clasp 97 is formed on a flange portion 96c formed at the lower end of the housing main body 96b placed on the base plate 96a. A harpoon-shaped hole 98 that engages with is formed along the rotational direction. The daruma-shaped hole 98 is formed in a shape in which a small-diameter long hole and a large-sized hole are continuous, and the large hole is formed to have a diameter slightly larger than the head of the clasp 97.
[0125]
Then, when the electrode tip attached to the tip of the gun arm is detached during teaching or during shaping, or when the shaping body 13 is replaced, the housing body 96b is rotated to make a saddle-shaped hole in the clasp 97. The large-diameter hole portion of the portion 98 is moved, and the housing main body 96b is removed from the base plate 96a.
[0126]
Next, teaching work is performed, or the dropped electrode tips are collected, or the snap ring 99 holding the shaped body 13 is removed and a new shaped body 13 is mounted, and then the flange 96c of the housing body 96b is drilled. The clasp 97 is inserted into the large-diameter hole portion of the saddle-shaped hole portion 98, the housing main body 96b is rotated, and the small-diameter long hole portion of the daruma-shaped hole portion 98 is engaged with the clasp 97. The main body 96b is fixed to the base plate 96a.
[0127]
In the present embodiment, the upper housing 96 is divided into the base plate 96a and the housing main body 96b, and only the housing main body 96b is detachable from the base plate 96a, so that space saving can be realized.
[0128]
By the way, in each of the above-described embodiments, the chips are dropped from the chip discharge port 22c (or 41c or 53d) formed at the lower end of the chip guide surface 22b (or 41b or 53c) to the chip collection container 27. In this case, the chips are likely to leak from the upper end opening of the chip collection container 27, causing a reduction in the recovery rate.
[0129]
In such a case, as shown in FIG. 26, a mortar-shaped guide surface 101 is formed in the upper end opening of the chip collecting container 27, or the guide surface 101 is retrofitted to the upper end opening. Chips leaking from the upper end opening of the powder collecting container 27 can be captured and the recovery rate can be improved.
[0130]
The gun arm is supplied with cooling water for cooling the electrode tip that generates heat during welding, but this cooling water is likely to leak from the vicinity of the connection between the gun arm and the electrode tip. If the cooling water leaks out, the cooling water falls together with the chips and accumulates in the chip collection container 27, so that the chip collection container 27 becomes full immediately.
[0131]
In such a case, as shown in FIG. 27, the bottom surface of the chip collection container 27 is opened, and a filter 110 made of a mesh or the like is disposed in the opening to deposit on the chip collection container 27. Drain the chips. And the cooling water dripped from this chip collection container 27 is collect | recovered by the cooling water collection containers (not shown), such as a bucket, via the funnel 111 arrange | positioned therebelow. Alternatively, a hose is connected to the funnel 111 to discharge the cooling water to the outside. As a result, the collection cycle of the chips accumulated in the chip collection container 27 can be extended.
[0132]
【The invention's effect】
As described above, according to the present invention, the positional relationship between the electrode tip and the shaped body during teaching can be easily confirmed without removing the entire apparatus, workability is good, and man-hours required for teaching can be reduced. It can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a chip collection device according to a first embodiment.
FIG. 2 is a horizontal sectional plan view of the upper case.
3 is a sectional view taken along line III-III in FIG.
4 is a sectional view taken along the line IV-IV in FIG.
FIG. 5 is a schematic front view of the chip collection device.
6 is a schematic front view of a chip collection device according to another embodiment of the present invention. FIG.
FIG. 7 is a front view of a chip collection device according to a second embodiment.
8 is a cross-sectional view taken along the line VIII-VIII in FIG.
FIG. 9 is a plan view of the chip collection device.
FIG. 10 is a perspective view of a chip collection device according to a third embodiment.
FIG. 11 is a perspective view of a lower case according to a fourth embodiment.
12 is an enlarged view of the main part of FIG.
FIG. 13 is a perspective view of a lower case according to a fifth embodiment.
FIG. 14 is a perspective view of a chip collection device according to a sixth embodiment.
FIG. 15 is a perspective view of a chip collection device according to a seventh embodiment.
FIG. 16 is a perspective view of a chip collection device according to an eighth embodiment.
FIG. 17 is a perspective view of a chip collection device according to a ninth embodiment.
18 is a cross-sectional front view of the main part of FIG.
FIG. 19 is a front view of a chip collection device according to a tenth embodiment.
FIG. 20 is a front view of the chip collection device with the shielding member removed and the upper housing opened.
FIG. 21 is a perspective view of a chip collection device according to an eleventh embodiment.
FIG. 22 is a perspective view of a chip collection device according to a twelfth embodiment.
23 is a cross-sectional plan view of the XXIII part of FIG. 22 according to the embodiment.
FIG. 24 is a plan view of a chip collection device according to a thirteenth embodiment.
25 is a sectional view taken along the line XXV-XXV in FIG.
FIG. 26 is a perspective view of a main part of a chip collection device according to another embodiment.
FIG. 27 is a perspective view of a main part of a chip collecting apparatus according to another embodiment.
[Explanation of symbols]
4,5 electrode tip
11a Dresser body
13 Shaped body
21, 41, 51 Chip capture case
22, 52 Lower case
22a, 41a, 52a Lower arm entrance
23b, 43b, 53a Upper arm entrance
23c Annular space
23d Chip outlet
24 Shielding member
25 ', 26' brush piece (unit)
25b, 26b Bracket
34, 42, 65 Air nozzle
72 Guide frame
74 Actuator
75 Leaf spring (biasing means)
77 Patchon lock (locking means)
79, 81 Hinge (turning support means)
91 Return spring
96 Upper housing
96a Base plate
96b housing body

Claims (1)

The dresser body is provided with a shaping body that shapes the tip of the electrode tip,
Cover the periphery of the shaped body with a chip capturing case,
In a chip dresser chip recovery device that opens an entrance leading the electrode chip to the shaping body in the chip capturing case,
The chip capturing case is divided into a first case and a second case fixed on both sides of the dresser body,
The at least one case, and formed in a substantially toroidal cover the annular space by an annular space surrounding the entrance to the interior,
Along the inner wall of the annular space in the ring-shaped space is disposed an air nozzle to circulate the air,
A chip dresser chip recovery device, wherein a chip discharge port is provided outside the ring on the case wall surface covering the annular space .

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