JP4519526B2 - Chip dresser for chip dresser - Google Patents

Description

  The present invention relates to a chip dresser chip recovery device that recovers chip generated when shaping an electrode tip.

  Electrode tips used for spot welding and the like are gradually worn (deformed or worn) by repeating the welding operation. When welding work is performed with a worn electrode tip, the welding quality is impaired. Therefore, the electrode tip is periodically shaped (dressed) to maintain the welding quality. For example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 6-122082), the upper and lower surfaces of the shaped body are narrowed with a pair of electrode tips provided at opposite ends of the welding gun, and then the welding gun is used as an electrode. There has been disclosed a tip dresser that shapes an electrode tip by swinging around the tip axis and polishing.

  In recent years, it has been studied to reuse chips from the reduction of material costs and environmental problems. A collecting container is arranged below the shaped body, and the chips collected in this collecting container are reused. I am doing so.

  However, the chips are likely to be scattered by the relative rotation or swinging 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. .

  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.

  By the way, as an electrode tip used for spot welding or the like, a lot of copper is used. However, if an appropriate welding quality is to be maintained, the frequency of polishing is increased, and the electrode tip grinding scraps or polishing scraps (chips) ) 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.

  Therefore, a technique has been proposed in which a chip collection device is attached to a dresser body that holds a shaped body, and chips generated during electrode chip shaping are collected by the chip collection device. For example, in Patent Document 2 (Japanese Patent Laid-Open No. 2003-1436), the upper and lower sides of the shaped body disposed in the dresser body are covered with the upper surface side recovery unit and the lower surface side recovery unit, respectively, and the lower surface side recovery unit is formed into a cylindrical shape. A chip collecting device is disclosed in which a chip collecting container is disposed at the lower end of the opening, and chips generated during shaping are collected in the chip collecting container via a lower surface side collecting unit. .

According to the description of Patent Document 2, since the upper and lower surfaces of the shaping body are covered with the recovery unit, and the chip collection container is disposed at the lower part of the lower surface side recovery unit, when shaping the electrode tip It is possible to efficiently collect the chips generated in the chip collection container without scattering them around.
JP-A-6-122082 JP 2003-1436 A

  In the chip collection device described in Patent Document 2, when shaping the electrode tip attached to the tip of the gun arm for spot welding, the electrode tip provided at the tip of the gun arm is inserted into the collection unit. Therefore, the insertion port opened in the collection unit is shielded by a flexible shielding member such as a brush to allow the gun arm to enter and to prevent chips from scattering.

  When the chip collection device described in Patent Document 2 is used, most of the chips generated when shaping the electrode tip fall and are collected in the chip collection container, but some of them fall Without being attached to the inner surface of the shielding member. When shaping of the electrode tip is repeated over a long period of time, a relatively large amount of chips accumulates on the inner surface of the shielding member. Most of the chips accumulated on the inner surface of the shielding unit are shaken off by vibration or the like when the gun arm is moved into or away from the shielding member.

  However, a part of the chips adhering to the shielding member is scattered and scattered outside without falling along with the returning operation of the shielding member to the initial posture, which occurs when the gun arm is retracted after the shaping is completed. There is something to do.

  In order to prevent the chips adhering to the shielding member from scattering to the outside, the shielding member is frequently cleaned. Alternatively, a measure such as more positively collecting chips adhering to the shielding member using a suction device such as a suction blower can be considered.

  However, since it is necessary to stop the chip dresser when cleaning the shielding member, there is a problem that the operating efficiency of the chip dresser is lowered and the productivity is lowered.

  In addition, when trying to collect chips by aggressive means such as a suction blower, the equipment itself becomes large, which not only increases equipment costs, but also tends to accumulate chips in the suction passage. There is a problem that becomes complicated.

  In view of the above circumstances, the present invention does not reduce the operating efficiency of the chip dresser, and does not require a large-scale device. An object of the present invention is to provide a chip dresser chip recovery device that can obtain a higher powder collection efficiency and is easy to maintain.

In order to achieve the above object, according to the present invention, a dresser body that holds a shaping body for shaping an electrode tip is provided with a chip collection unit that covers the shaping body, and the electrode tip is inserted into the chip collection unit. In the chip dresser chip recovery device provided with a shielding unit that opens an insertion port, and the insertion port closes the insertion port and allows the electrode chip to move back and forth. And having at least two shielding members arranged along the advancing / retreating operation direction, each shielding member being arranged at a set interval to form a gap between opposing surfaces of each shielding member, and the gap The left and right directions and the outside are closed through a seal member, and the lower portion of the gap is communicated with the chip collection unit.

  According to the present invention, chips are not scattered from the shielding member to the outside with a simple configuration without reducing the operating efficiency of the chip dresser, and without requiring a large-scale device. Not only can it be collected efficiently, but also maintenance can be facilitated.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 5 show a first embodiment of the present invention. Here, FIG. 1 is a perspective view of a chip dresser chip recovery device, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a front view thereof, FIG. 4 is a sectional view taken along line IV-IV in FIG. It is a disassembled perspective view.

  Reference numeral 1 in FIGS. 1 and 4 is a welding gun connected to a welding robot. The welding gun 1 is provided with first and second gun arms 2 and 3, and electrode tips 4 are provided at the tips of both gun arms 2 and 3. , 5 are 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.

  Reference numeral 6 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.

  A holder portion 6b is provided at a tip portion of a dresser body 6a extending to the side of the chip dresser 6, and a shaping body 7 is held by the holder portion 6b so as to be rotatable or swingable. At least the front portion of the dresser body 6a is formed in a flat plate shape whose upper and lower surfaces are parallel. The shaping body 7 is driven to rotate or swing by a motor 8 suspended on the base side of the dresser body 6a, and the tips of the electrode tips 4 and 5 are ground or polished on the lower and upper surfaces of the shaping body 7. Concave cutters 7a and 7b that can be shaped into a predetermined shape by grinding are provided. The motor 8 is not limited to an air motor that uses compressed air as a drive source, and may be a normal electric motor.

  Further, reference numeral 11 denotes a chip collecting device, which is divided into an upper surface side collecting unit 11a and a lower surface side collecting unit 11b that are opposed to each other across the top and bottom surfaces of the dresser body 6a. Both the recovery units 11a and 11b are provided with an upper surface support plate 12 and a lower surface support plate 13 that are respectively brought into contact with the top and bottom surfaces of the dresser body 6a.

  Both the support plates 12 and 13 are horizontally long flat plates and are formed in substantially the same shape, and both sides of the support plates 12 and 13 are protruded laterally from both side edges of the dresser body 6a and face each other. The corners of the flange surfaces 12a and 13a projecting sideways from the dresser body 6a of the support plates 12 and 13 are fastened to each other via bolts 14 (see FIG. 3) which are examples of fastening members. Both recovery units 11a, 11b are fixed in a state where the top and bottom surfaces of the dresser body 6a are sandwiched.

  Further, an upper boss 15 projects from the upper surface of the center of the upper surface support plate 12. The upper boss 15 is provided with an arm insertion port 21c penetrating in the vertical direction. The upper shielding member 16 is brought into contact with the upper surface of the arm insertion port 21 c, and the upper shielding member 16 is clamped and fixed on the upper boss 15 by the frame body 17.

  The upper shielding member 16 is in sliding contact with the outer periphery of the second gun arm 3 inserted into the inside from the outside, and closes the gap between the outer periphery of the second gun arm 3 and the arm insertion port 21c. Is formed of a member having flexibility and heat resistance, such as a rubber plate formed with a brush or a radially arranged brush. The upper shielding member 16 is not required to have high airtightness because it only has to prevent the chips generated when shaping the electrode tip 5 from scattering to the outside.

  Further, an air nozzle 18 whose tip is directed toward the shaping body 7 is disposed on one side of the upper boss 15. The air blown out from the air nozzle 18 is blown onto the shaping body 7 to prevent the shaping body 7 from being clogged.

  On the other hand, an escape hole for the shaping body 7 is formed at substantially the center of the lower surface support plate 13, and a lower boss 19 is provided so as to surround the escape hole from the bottom surface of the lower surface support plate 13 downward. A ring member 22 fixed to the upper surface of the chip capturing case 21 is externally mounted on the lower boss 19. A screw 23 is screwed into the ring member 22 from four directions. By tightening the screw 23 to the lower boss 19, the ring member 22 is fixed to the lower boss 19, and the chip capturing case 21 is fixed to the lower boss 19. Suspended by.

  A hole having substantially the same diameter as the inner diameter of the ring member 22 is formed in a portion corresponding to the ring member 22 on the upper surface of the chip capturing case 21. Further, a chip guide portion 21a is formed in a tapered shape at the lower portion of the chip capturing case 21 so as to converge downward, and a discharge port 21b is formed at the lower end of the chip guide portion 21a.

  Further, the front surface of the chip capturing case 21 is formed flat, and an arm insertion port 21c is opened vertically in the flat surface. Above the arm insertion port 21c, a flange portion 21d that protrudes forward from the upper surface of the chip capturing case 21 is exposed. Further, a chip collection portion 21e protruding forward from the chip guide portion 21a is formed below the arm insertion port 21c, and a collection port 21f is opened at the upper end of the chip collection portion 21e.

  A shielding unit 24 is disposed at the arm insertion port 21c. As shown in FIG. 5, the shielding unit 24 includes a pair of left and right brush portions 25 and 26, and the left and right brush portions 25 and 26 have a symmetrical structure. In the following description, the same reference numerals are assigned to symmetrical components of the left and right brush portions 25 and 26 to simplify the description.

  The left and right brush portions 25, 26 have a double shielding structure including an outer brush body 29 and an inner brush body 30 as shielding members, and between the brush bodies 29, 30, A seal member 31 as a seal member for sealing between 30 and a spacer 32 for maintaining a space between both brush bodies 29 and 30 are disposed.

  The outer surface brush main body 29 and the inner surface brush main body 30 have the same shape, and are elongate rectangular plate portions 29a, 30a, and brush members 29b implanted on the end surfaces on the long sides of the plate portions 29a, 30a, 30b, and a plurality of screw holes 29c, 30c are formed at predetermined intervals in each plate portion 29a, 30a. The plate portions 29a and 30a are made of a metal plate or a hard resin plate, and have a certain degree of rigidity. Further, the brush members 29b and 30b are formed of a member having a certain degree of durability and flexibility such as nylon.

  The seal member 31 is formed of an elastically deformable member such as sponge or rubber, and its length in the long side direction is substantially the same as the length in the long side direction of the plate portions 29a and 30a. Is formed slightly thicker than the height of the spacer 32. The spacers 32 are respectively disposed between the screw holes 29c and 30c formed in both the plate portions 29a and 30a.

  The plate portion 30a of the inner brush body 30 is brought into contact with a mounting surface 21g formed on the side edge of the arm insertion port 21c, and the plate portion 29a of the outer brush body 29 is placed on the front surface via a seal member 31 and a spacer 32. Arranged. The upper end and the lower end of each plate portion 29a, 30a are formed to be substantially the same as or slightly shorter than the distance between the bottom surface of the flange portion 21d and the upper end of the chip collection portion 21e.

  As shown in FIGS. 1 to 4, in a state where the left and right brush portions 25, 26 are attached to the front surface of the chip capturing case 21 using screws 33, the plate portions 29 a, 30 a sandwiched via the spacer 32. The thickness between them is substantially the same as the protruding end of the flange portion 21d and the tip of the recovery port 21f opened at the upper end of the chip recovery portion 21e. Further, the left and right end portions of the left and right brush portions 25 and 26 are substantially flush with the width direction of the chip capturing case 21.

  Further, in this state, the tips of the brush members 29b and 30b provided in the left and right brush portions 25 and 26 are brought into contact with each other at substantially the center of the arm insertion port 21c, and the arm insertion port 21c becomes the brush member 29b, Double shielded at 30b.

  A space 34 is formed between the brush members 29b, 30b by a spacer 32 so as to be maintained at a constant interval, and the space 34 communicates with a recovery port 21f opened in the chip recovery portion 21e. The left and right brush portions 25 and 26 are for preventing chips generated when shaping the electrode tips 4 and 5 from scattering from the arm insertion port 21c to the outside. Airtightness is not required for occlusion.

  On the other hand, the upper end of the chip collecting container 27 is suspended from a discharge port 21 b opened at the lower end of the chip capturing case 21 via a suspension bolt 28. The chip collection container 27 is preferably lightweight. For example, it is possible to cut the upper part of a plastic bottle and use the lower part as the chip collection container 27.

  Next, an effect | action at the time of attaching the chip collection apparatus 11 by such a structure to the dresser main body 6a is demonstrated.

  A shielding unit 24 is attached to the front surface of the chip capturing case 21. As shown in FIG. 5, the left and right brush portions 25, 26 constituting the shielding unit 24 are provided with plate portions 29 a, 30 a provided on the outer brush body 29 and the inner brush body 30, respectively, through a seal member 31. At the same time, a spacer 32 is interposed at a position corresponding to the screw holes 29c and 30c drilled in both plate portions 29a and 30a.

  Next, a screw 33 is inserted from the outside into the screwing hole 29c drilled in the outer brush body 29, and the screw 33 is drilled in the spacer 32 and the plate portion 30a of the inner brush body 30. The screwing hole 30c is screwed to the mounting surface 21g formed on the front surface of the chip capturing case 21.

  Since the thickness of the seal member 31 is formed slightly thicker than the height of the spacer 32, when both the plate portions 29 a and 30 a of the outer brush body 29 and the inner brush body 30 are tightened together via the screw 33, the seal member 31 is elastically deformed, and both surfaces thereof are in contact with or in close contact with the plate portions 29a and 30a. Further, the length in the height direction (long side direction) of each of the plate portions 29a and 30a and the seal member 31 is between the flange portion 21d formed in the vertical direction of the front surface of the chip capturing case 21 and the recovery port 21f. It is formed to be almost the same as the distance.

  Therefore, when the left and right brush portions 25, 26 are attached to the front surface of the chip capturing case 21, the left / right direction is blocked by the seal member 31. In the upper part, the entire thickness of the left and right brush parts 25, 26 is substantially flush with the protruding end of the flange part 21d formed on the front surface of the chip capturing case 21 and the tip of the recovery port 21f. The portion 21d and the upper end surface of the seal member 31 and the upper end portions of the brush members 29b and 30b are closed. On the other hand, in the lower part, the lower end of the plate portion 29a provided on the outer brush body 29 abuts on the end surface of the recovery port 21f, and the lower end of the brush member 29b contacts or approaches the end surface of the recovery port 21f.

  Further, the tips of the brush members 29b and 30b provided on the left and right brush portions 25 and 26 are brought into contact with each other at the substantially center of the arm insertion port 21c, and the arm insertion port 21c is brought into contact with both the brush members 29b and 30b. Double shielded. Further, the lower side of the gap portion 34 formed between the brush members 29b and 30b is communicated with a recovery port 21f opened in the chip recovery portion 21e.

  Next, the upper surface support plate 12 constituting the upper surface side collection unit 11a and the lower surface support plate 13 constituting the lower surface side collection unit 11b are attached to the upper and lower surfaces of the dresser body 6a.

  In this attachment, as shown in FIG. 2, first, the upper surface support plate 12 and the lower surface support plate 13 constituting the lower surface side recovery unit 11b are brought into contact with the upper and lower surfaces of the dresser body 6a. Next, an arm insertion port 21c provided at substantially the center of the upper surface support plate 12 and a lower boss 19 projecting at substantially the center of the lower surface support plate 13 are provided at the tip of the dresser body 6a. It is positioned substantially coaxially with respect to the holder portion 6b.

  And the corner | angular part of the flange surfaces 12a and 13a of both the support plates 12 and 13 which protruded from the both-sides edge part of the dresser main body 6a to the side is fastened with the volt | bolt 14, and both support plates 12 and 13 are attached to the dresser main body 6a. Secure with the tip pinched.

  In this embodiment, the chip recovery device 11 is divided into an upper surface side recovery unit 11a and a lower surface side recovery unit 11b, and the support plates 12 and 13 provided on both recovery units 11a and 11b are disposed at the front part of the dresser body 6a. Since the abutting and fastening portions projecting from both side edges of the dresser body 6a are fastened, if the upper surface and the lower surface of the dresser body 6a are formed of parallel surfaces, the thickness, width, Even if the shape or the like is different, the chip collection device 11 can be attached to almost all the chip dressers 6.

  Next, the lower boss 19 protruding from the bottom surface of the lower surface support plate 13 is covered with the ring member 22 protruding from the upper surface of the chip capturing case 21, and the front surface of the chip capturing case 21, that is, the arm. The surface in which the insertion port 21c is opened is directed in the direction in which the first gun arm 2 enters, and in this state, the screw 23 screwed into the ring member 22 is tightened, and the tip is pressed against the lower boss 19 Then, the chip capturing case 21 is positioned and fixed, and the mounting is completed.

  Next, the operation of shaping (dressing) the tips of the electrode tips 4 and 5 will be described. After the spot welding operation using the welding robot is completed, the first and second gun arms 2 and 3 provided on the welding gun 1 are moved in the direction of the dresser body 6a in accordance with the operation taught in advance.

  Next, the first gun arm 2 is inserted through the arm insertion port 21c of the chip capturing case 21 attached to the lower surface of the dresser body 6a so as to face the inside. At this time, since the arm insertion port 21c of the chip capturing case 21 is adjusted in advance to be directed in the direction in which the first gun arm 2 enters, the first gun arm 2 can be smoothly moved into the chip capturing case 21. Can lead to.

  The arm insertion port 21c is doubly shielded by a pair of brush members 29b and 30b extending from the left and right. When the first gun arm 2 is inserted, the opposing brush members 29b and 30b are in the second state. It elastically deforms along the outer periphery of the gun arm 3 and closes the periphery of the first gun arm 2.

  The axial center of the electrode tip 4 provided at the tip of the first gun arm 2 is made to face the central axis of the shaping body 7 held by the holder portion 6b provided in the dresser body 6a. At this time, since the electrode tip 4 and the electrode tip 5 provided at the tip of the second gun arm 3 are arranged coaxially, the electrode tip 5 is also placed on the central axis of the shaped body 7. It will come.

  Thereafter, both gun arms 2 and 3 are moved to bring both electrode tips 4 and 5 closer together. Then, first, the electrode tip 5 provided at the tip of the second gun arm 3 is inserted into the arm insertion port 21 c formed in the upper boss 15 protruding from the upper surface support plate 12. The upper surface of the arm insertion port 21c is closed by a flexible upper shielding member 16, and the outer periphery of the second gun arm 3 is closed by the upper shielding member 16.

  When the electrode chips 4 and 5 are further brought closer, the electrode chips 4 and 5 are brought into contact with the cutters 7a and 7b provided on the lower surface and the upper surface of the shaping body 7, respectively. The shaped body 7 is narrowed by 5.

  The shaping body 7 is driven to rotate or swing by a motor 8 such as an air motor provided in the dresser body 6a, and from the air nozzle 18 facing the arm insertion port 21c, the shaping body 7 Air is being blown out toward 7. The air blown out from the air nozzle 18 flows from the arm insertion port 21c through the gap formed in the holder portion 6b and the shaping body 7 to the chip capturing case 21 side, as shown by the arrow in FIG. The air is blown out from the arm insertion port 21c of the chip capturing case 21 and the discharge port 21b formed at the bottom.

  Then, chips (polishing powder) generated when the electrode chips 4 and 5 are shaped by grinding or grinding by the cutters 7 a and 7 b provided on the shaping body 7 are air nozzles 18 facing the upper boss 15. Is blown to the chip capturing case 21 side by air blow. At this time, the chips introduced to the air leaking from the arm insertion port 21c collide with the brush members 29b and 30b disposed in the arm insertion port 21c and fall into the chip capturing case 21. . The chips dropped in the chip capturing case 21 are passed through a chip guide part 21a formed in the lower part of the chip capturing case 21, and then discharged from the outlet 21b opened at the lower end of the chip guide part 21a. Is collected in a chip collection container 27 suspended on the surface.

  On the other hand, when the shaping of the electrode tips 4 and 5 is completed, the welding robot separates the first and second gun arms 2 and 3 from the dresser body 6a by the reverse operation of the insertion, and performs the next spot welding. Prepare and wait.

  By the way, when the first gun arm 2 is retracted after the shaping is completed, the brush member 30b of the inner surface brush body 30 that is in sliding contact with the outer periphery of the first gun arm 2 moves along with the retracting operation of the first gun arm 2. The initial posture, that is, the bent posture shown in FIG. 1, tries to return to the linear posture shown in FIG. Since the brush member 30b of the inner surface brush main body 30 is exposed in the chip capturing case 21, if shaping (dressing) of the electrode tips 4 and 5 is repeated over a long period of time, the chip (polishing powder) is applied to the brush member 30b. Adhering or depositing. The adhering or accumulated chips are repelled outward by the returning operation of the brush member 30b.

  The left and right brush portions 25, 26 according to this embodiment have a double shielding structure with the inner brush body 30 and the outer brush body 29, and the front of the brush member 30 b provided on the inner brush body 30 is the outer brush body 29. Since the gap portion 34 is formed by the brush member 29b, the seal member 31, and the flange portion 21d formed in the chip capturing case 21, the chips that are repelled forward by the brush member 30b are formed. It does not scatter outside. In this case, the flange portion 21d functions as a seal member.

  As a result, the chips blown into the gap 34 fall by their own weight, reach the chip guide portion 21a through the recovery port 21f opened downward, and are collected in the chip collection container 27.

  Then, when the amount of chips accumulated in the chip collection container 27 reaches a predetermined amount, or periodically, the chips accumulated in the chip collection container 27 are collected and reused.

  Thus, in this embodiment, the chip capturing case 21 is rotatably supported with respect to the dresser body 6a, and the surface where the arm insertion port 21c is opened is directed in the direction in which the gun arm 2 enters. Since it can be fixed, the gun arm 2 can be smoothly guided into the chip capturing case 21 and the installation direction can be given flexibility, so that the usability is improved.

  Furthermore, since the electrode tips 4 and 5 are shaped in the closed space, the chips generated during the shaping are not scattered outside, but are efficiently collected in the chip collection container 27 and reused. Therefore, the chip recycling rate is improved. In addition, the air for preventing clogging of the shaped body 7 is used to actively guide the chips to the discharge port 21b side of the chip capturing case 21, so that the efficiency of collecting chips is further increased. Further improvement.

  In addition, when the first gun arm 2 is retracted, even if chips adhering to or accumulating on the brush member 30b are repelled forward by the brush member 30b of the inner surface brush main body 30, the front gun is blocked. Since the formed gap portion 34 is formed, the chips are not scattered outside, and the surrounding environment of the chip dresser 6 can always be kept good.

  Moreover, since the chips blown off by the brush member 30b fall in the gap 34 and are collected, the collection efficiency of the chips can be further increased.

  Further, every time the first gun arm 2 is retracted, the chips adhering to or accumulated on the brush member 30b are repelled and collected, so that the cleaning cycle of the shielding unit 24 can be lengthened. Therefore, maintenance management becomes easy, and the operating efficiency of the chip dresser 6 can be increased. In addition, a large-scale device such as a suction blower becomes unnecessary, and the equipment cost can be suppressed.

  In addition, when the first gun arm 2 and the electrode tip 4 are retracted after completion of shaping, the two brush members 29b and 30b wipe away the surroundings, so that the amount of chips attached is small. Thus, the welding quality can be improved.

  FIG. 6 shows a second embodiment of the present invention. In addition, about the same component as 1st form, while attaching | subjecting the same code | symbol and abbreviate | omitting description, it is a component which is not illustrated, Comprising: About the same component as 1st form, it is the same A reference numeral is attached and an explicit illustration is omitted.

  In the first embodiment described above, the shielding unit 24 that closes the arm insertion port 21c through which the first gun arm 2 enters has a double shielding structure. However, in this embodiment, the upper surface through which the tip of the second gun arm 3 is inserted. The upper shielding unit 35 provided in the side collection unit 11a has a double shielding structure.

  That is, the frame 17 having the same shape is disposed vertically, and a seal member 36 formed in a ring shape is interposed therebetween, and a spacer 37 is disposed on the outer periphery thereof. The seal member 36 is formed of an elastically deformable member such as sponge or rubber, and the height thereof is slightly higher than the height of the spacer 37.

  For the upper boss 15, first, the lower frame 17 is set, a ring-shaped seal member 36 is placed thereon, and a spacer 37 is disposed at a screwing position. Then, the upper frame body 17 is placed thereon, and both the frame bodies 17 are screwed through the spacers 37. Then, the upper and lower surfaces of the seal member 36 are compressed and brought into contact with or in close contact with the opposing surfaces of the two frame bodies 17, thereby forming a gap portion inside.

  In the chip collecting apparatus configured as described above, when the second gun arm 3 is retracted upward after the shaping, the resilience of the upper shielding member 16 provided on the lower frame 17 is used to perform this operation. Even if the chips adhering to the upper shielding member 16 are blown upward, the gap blocked by the seal member 36, the upper frame body 17, and the upper shielding member 16 provided on the frame body 17 is disposed above the chips. Since the portion is formed, the repelled chips are deposited in this gap portion without being scattered outside.

  The chip accumulated in the gap is provided at the upper frame 17 with the tip of the second gun arm 3 in order to shape the electrode tip 5 attached to the tip of the second gun arm 3 at the time of the next shaping. When the upper shielding member 16 is inserted into the upper shielding member 16 provided on the lower frame 17 through the upper shielding member 16, the upper shielding member 16 is dropped along with the bending operation.

  Therefore, chips do not accumulate more than a certain amount in the gap. As a result, the cleaning cycle of the upper shielding unit 35 can be lengthened.

  According to the present embodiment, the chip collection efficiency can be further enhanced by employing the shield unit 24 according to the first embodiment, and the surrounding environment of the chip dresser 6 can be further improved.

  In addition, this invention is not restricted to each form mentioned above, For example, the shielding units 24 and 35 may have a triple or more shielding structure.

The perspective view of the chip dresser chip collection device by the 1st form The exploded perspective view of the chip dresser chip recovery device Front view of chip dresser chip recovery device IV-IV sectional view of Fig. 3 The exploded perspective view of the shielding unit The principal part disassembled perspective view of the chip dresser chip recovery device by the 2nd form

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Welding gun, 2 ... 1st gun arm, 3 ... 2nd gun arm, 4, 5 ... Electrode tip, 6 ... Tip dresser, 6a ... Dresser main body, 7 ... Shaped body, 11 ... Chip collection device, 11a ... Upper surface side recovery unit, 11b ... Lower surface side recovery unit, 16 ... Upper shielding member, 21 ... Chip capture case, 21c ... Arm insertion port, 21e ... Chip recovery part, 21f ... Recovery port, 24 ... Shielding unit, 25 ... Left brush part, 26 ... right brush part, 29 ... outer brush body, 29b, 30b ... brush member, 30 ... inner brush body, 31, 36 ... seal member, 32, 37 ... spacer, 33 ... screw, 34 ... gap 35: Upper shielding unit

Agent Patent Attorney Susumu Ito

Claims (5)

A dresser body that holds a shaping body that shapes the electrode tip is provided with a chip collection unit that covers the shaping body, and an insertion port for inserting the electrode chip into the chip collection unit is opened. In the chip dresser chip collecting device provided with a shielding unit that closes the insertion port and allows the electrode chip to move back and forth,
The shielding unit has at least two shielding members disposed along the forward / backward movement direction of the electrode tip,
Each of the shielding members is disposed at a set interval to form a gap between the opposing surfaces of the shielding members,
A chip dresser chip collecting apparatus, wherein the left and right direction of the gap and the outside are closed through a seal member, and the lower part of the gap is communicated with the chip collecting unit. 2. The chip dresser chip collecting apparatus according to claim 1, wherein the chip collecting units are respectively disposed on both sides of the shaped body with the dresser body interposed therebetween. 3. The chip dresser chip collection device according to claim 1, wherein the interval between the shielding members is set by a spacer. The upper part of the gap is closed by a flange provided in the chip collection unit.
The chip recovery apparatus for chip dressers according to any one of claims 1 to 3, wherein: Provided below each shielding member is a chip collection part that protrudes forward from the chip guide part formed in the chip collection unit, and a recovery port that communicates with the gap at the upper end of the chip collection part Provided
The chip recovery apparatus for chip dressers according to any one of claims 1 to 4, wherein:

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