JP2010162560A - Tip dresser apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tip dresser apparatus capable of cutting an electrode tip used for the electric resistance spot welding with excellent accuracy. <P>SOLUTION: A fixed side restricting member 13 having a restriction hole 13d in which a fixed shank or a circumferential surface of an electrode tip to be mounted on the fixed shank is inserted is provided below a rotary blade 8. Thus, the entire welding gun is not oscillated, and the positional relationship in the horizontal direction between the rotary blade 8 and the electrode tip is fixed. Thus, the electrode tip mounted on the fixed shank and a movable shank can be cut and faired with excellent accuracy. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a tip dresser device capable of cutting an electrode tip used in an electric resistance spot welder with high accuracy.

  In an electric resistance spot welding line for welding a white body or the like of an automobile, a workpiece is sandwiched between a pair of electrode tips attached to a welding gun, pressurized and energized, and welded by electric resistance heat generated by the workpiece. The electrode tip used for this electric resistance spot welding is deformed and worn when the welding is repeated, and the welded object is deposited on the surface, so that good welding cannot be continued. Therefore, when the number of hit points reaches a certain level or more, it is necessary to cut the surface of the electrode tip to keep the outer shape constant and to clean the surface of the electrode tip.

  Such cutting of electrode tips has been performed by using a lathe in the past, but polishing with a lathe requires skill and is difficult for an amateur, so a chip dresser device is used. It is getting to be. This tip dresser device has a rotary blade that rotates by gear drive, and by driving a robot arm and a welding gun, a pair of electrode tips are pressed against the tip from above and below, and in this state the rotary blade The pair of electrode tips are cut at the same time by rotating.

  Such a chip dresser device has an equalizing function in which the entire chip dresser device is slidably attached to the gantry in order to position the tip in the height direction according to the wear amount of the electrode tip. Yes. However, such a chip dresser device has a problem that the entire chip dresser device rattles due to the equalizing function and cannot be cut with high accuracy. In addition, since the entire chip dresser device rattles, there is a problem that robot teaching for cutting the electrode tip is difficult.

  Therefore, as shown in Patent Document 1, a chip dresser device in which only a rotary blade is slidable up and down has been proposed. However, even in such a tip dresser device, the welding gun is generally attached to the tip of an articulated robot, and the position of the electrode tip and the rotary blade is fixed only by the pressing force that sandwiches the rotary blade with the electrode tip. As a result, the entire welding gun is swayed and the electrode tip cannot be cut with high accuracy, resulting in a problem of poor welding.

JP 2001-287046 A

  An object of the present invention is to solve the above-mentioned problems and to provide a tip dresser device capable of cutting an electrode tip used for electric resistance spot welding with high accuracy.

Invention of Claim 1 made | formed in order to solve the said subject has a rotary blade which rotates in which two cutting blade edges were formed,
An electrode tip attached to the tip of the fixed shank, and an electrode tip attached to the tip of a movable shank that is detachable from and opposite to the fixed shank, sandwiching two cutting blade edges of the rotary blade, and the electrode tip A chip dresser device for simultaneously shaping
A fixed-side restraining member in which a restraining hole into which the peripheral surface of the fixed shank or the electrode tip attached to the fixed shank is inserted is provided at a position closer to the entry side of the fixed shank than the rotary blade, and is fixed to the rotary blade The electrode tip is cut in a state where the horizontal positional relationship with the shank or the electrode tip attached to the fixed shank is fixed.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, a visual recognition part is formed at a position closer to the entry side of the fixed shank than the restraining hole of the stationary side restraining member.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the width of the fixed side restraining member gradually decreases from the entry side of the fixed shank toward the restraining hole, A guide surface to be connected is formed.

  According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the sliding surface that gradually decreases in width toward the outer surface of the fixed-side restraining member and connects to the outer edge of the restraining hole. A surface is formed.

  According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the movable shank or the peripheral surface of the electrode tip attached to the movable shank is located at a position closer to the movable shank than the rotary blade. A movable side restraint member having a restraint hole to be inserted is provided, and the electrode tip is cut in a state in which the horizontal positional relationship between the rotary blade and the movable shank or the electrode tip attached to the movable shank is fixed. It is characterized by comprising.

  A sixth aspect of the present invention is the guide surface according to the fifth aspect, wherein the width of the movable side restraining member gradually decreases from the fixed shank entry side toward the restraining hole, and the guide surface is connected to the restraining hole. Is formed.

  A seventh aspect of the invention is characterized in that, in the first to sixth aspects of the invention, the rotary blade is configured to be slidable in the movable direction of the movable shank.

The invention according to claim 1 is a fixed side restraint member in which a restraint hole into which a peripheral surface of a fixed shank or an electrode tip attached to the fixed shank is inserted is formed at a position closer to the entrance side of the fixed shank than the rotary blade. The electrode tip is cut in a state where the positional relationship in the horizontal direction between the rotary blade and the fixed shank or the electrode tip attached to the fixed shank is fixed.
For this reason, the entire welding gun is not shaken, and the horizontal positional relationship between the rotary blade and the electrode tip is fixed. Therefore, the electrode tip attached to the tip of the fixed shank and the movable shank can be accurately cut and shaped. Is possible.

The invention according to claim 2 is characterized in that a visual recognition part is formed at a position closer to the entry side of the fixed shank than the restriction hole of the fixed side restriction member.
For this reason, when teaching the robot arm, it is easy for the operator to grasp the position of the restraint hole of the restraining member on the fixed side and the position of the electrode tip attached to the tip of the fixed shank. It becomes easy to teach the robot arm the operation of inserting the formed electrode tip into the restraining hole.

The invention according to claim 3 is characterized in that the fixed-side restraining member is formed with a guide surface that gradually decreases in width from the entry side of the fixed shank toward the restraint hole and connects to the restraint hole.
For this reason, even when the fixed shank is bent, the electrode tip attached to the tip of the fixed shank moves to the restraint hole side while contacting the guide surface, and is guided to the restraint hole by the guide surface. The electrode tip attached to the fixed shank can be surely inserted into the restraining hole, and the electrode tip can be cut and shaped.

The invention described in claim 4 is characterized in that a sliding surface is formed on the outer surface of the fixed-side restraining member that gradually decreases in width upward and connects to the outer edge of the restraining hole.
For this reason, the cutting powder generated when the electrode tip is cut slides down the sliding surface and is discharged, and it is possible to prevent the cutting powder from staying around the restraint hole.

The invention according to claim 5 is a movable side restraint member in which a restraint hole into which a peripheral surface of a movable shank or an electrode tip attached to the movable shank is inserted is formed at a position closer to the movable shank than the rotary blade. The electrode tip is cut in a state where the positional relationship in the horizontal direction between the rotary blade and the movable shank or the electrode tip attached to the movable shank is fixed.
For this reason, since the movement of the electrode tip attached to the tip of the movable shank is also restricted by the restraining hole, the electrode tip attached to the tip of the movable shank can be cut and molded with higher accuracy. Is possible.

The invention according to claim 6 is characterized in that a guide surface connected to the restraint hole is formed on the movable restraint member, the width gradually decreasing from the fixed shank entry side toward the restraint hole.
For this reason, even when the movable shank is bent, the electrode tip attached to the tip of the movable shank moves to the restraint hole side while contacting the guide surface, and is guided to the restraint hole by the guide surface. The electrode tip attached to the movable shank can be surely inserted into the restraining hole, and the electrode tip can be cut and shaped.

The invention described in claim 7 is characterized in that the rotary blade is configured to be slidable in the movable direction of the movable shank.
For this reason, the followability of the rotary blade to the electrode tip is improved, and the electrode tip can be molded with higher accuracy.

It is a side view of the chip dresser device showing an embodiment of the invention. It is a front view of FIG. FIG. 3 is a top view of FIG. 2. It is detail drawing of a gear box. It is detail drawing of a holder and a rotary blade. It is a 3rd page figure of a shank guide. It is explanatory drawing which showed the operation state of the chip dresser apparatus.

(Structure of the chip dresser device of the present invention)
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a chip dresser device 40 showing an embodiment of the present invention. 2 is a front view of FIG. 1, and FIG. 3 is a top view of FIG. Reference numeral 1 denotes a housing of the chip dresser device 40. The housing 1 has a box shape. The housing 1 is attached to a gantry 50 disposed on a welding line or the like.

  1-3, 2 is a gear box, 3 is a drive device. The gear box 2 is attached to the upper part of the housing 1. The drive device 3 is attached to the gear box 2 in a suspended manner. The drive device 3 gives a rotational force to a primary gear 4 disposed in a gear box 2 described later. In the present embodiment, the driving device 3 is an electric motor. However, the driving device 3 may be driven by compressed air.

  FIG. 4 shows a detailed view of the gear box 2. FIG. 4A is a gear arrangement diagram in which the gears arranged in the gear box 2 are viewed from above. FIG. 4B is a longitudinal sectional view of the gear box 2. A gear is disposed in the gear box 2. In the present embodiment, a primary gear 4, a secondary gear 5, and a holder gear 6 are rotatably arranged in parallel in the gear box 2.

  The primary gear 4 is attached to the rotating shaft 3 a of the driving device 3. The secondary gear 5 is disposed adjacent to the primary gear 4. In the secondary gear 5, a large diameter tooth 5a and a small diameter tooth 5b having a smaller number of teeth than the large diameter tooth 5a are formed coaxially. The large-diameter tooth 5a of the canned gear 5 meshes with the primary gear 4. The number of teeth of the large-diameter tooth 5 a of the secondary gear 5 is larger than the number of teeth of the primary gear 4.

  The holder gear 6 is disposed adjacent to the secondary gear 5. The holder gear 6 meshes with the small diameter teeth 5 b of the secondary gear 5. The number of teeth of the holder gear 6 is larger than the number of small-diameter teeth 5b of the secondary gear 5. With this configuration, the rotational speed of the drive device 3 is reduced, and the rotational torque applied to the holder gear 6 is increased.

  At the center of the holder gear 6, a holder housing portion 6a having a circular cross section is formed in communication. A key groove 6b is formed in the up-down direction on the peripheral surface of the holder housing 6a. The holder 7 is accommodated in the holder accommodating portion 6a so as to be slidable up and down.

  FIG. 5 shows a detailed view of the holder 7 and the rotary blade 8. FIG. 5A is a top view of the holder 7 to which the rotary blade 8 is attached. (B) of FIG. 5 is a BB sectional view of (A). As shown in FIG. 5, the holder 7 has a substantially cylindrical shape in which a quarter arc is cut out in the present embodiment. In the center of the holder 7, an electrode intrusion recess 7 a that is recessed to open upward and an electrode entry recess 7 b that is recessed to open downward are formed. The cross-sectional shapes of the electrode intrusion recess 7a and the electrode intrusion recess 7b are circular, and the inner diameter gradually increases and expands toward the opening direction.

  At the upper end of the holder 7, a locking portion 7c having a larger outer diameter than other portions is formed. As shown in FIG. 4, the holder 7 is accommodated in the holder accommodating portion 6 a of the holder gear 6 with the locking portion 7 c facing upward. Therefore, the holder 7 can slide upward (movable direction side of the movable shank 102 (shown in FIG. 7)) with respect to the holder gear 6, but the locking portion 7 c is connected to the upper surface of the holder gear 6. The holder 7 is prevented from falling off the holder gear 6 because it is brought into contact with and locked. The holder 7 is slidable upward with respect to the holder gear 6 by a predetermined distance.

  The sliding distance of the holder 7 is longer than the maximum cutting length of the electrode tip 105 to be cut. In this embodiment, the sliding distance of the 1 mm holder 7 is made longer than the maximum cutting length. For example, when the maximum cutting length is 6 mm, the sliding distance of the holder 7 is set to 7 mm. For this reason, as will be described later, the electrode tip 105 to which the movable shank 101 and the fixed shank 102 are attached can be reliably pressed against the cutting edge 8a of the rotary blade 8, and the electrode tip 105 is reliably cut. It is possible to do.

  On the outer peripheral surface of the holder 7, a key groove 7 d is formed in the up-down direction. As shown in FIG. 4, a key 9 that engages with the key groove 6 b of the holder gear 6 is attached to the key groove 7 d of the holder 7. For this reason, the holder 7 and the holder gear 6 are rotated together without being idle.

  One surface of the holder 7 cut out in an arc shape is a rotary blade mounting portion 7e. The rotary blade 8 has a plate shape whose outer edge has a mountain shape. The rotary blade 8 is mounted in contact with the rotary blade mounting portion 7e of the holder 7. Cutting blade edges 8 a and 8 b are formed on both oblique edges of the rotary blade 8. The cutting edge 8a, 8b has a shape corresponding to the tip shape of the electrode tip 105 to be cut. The cutting blade edges 8a and 8b penetrate into the electrode penetration recesses 7a and 7b, respectively.

  1-4, the holder 7 is arrange | positioned in the position which protruded further from the front board 1b of the housing | casing 1 to the front side.

  As shown in FIGS. 1 and 2, a fixed-side restraining member 13 is attached to the front plate 1 b via a bracket 11. As shown in FIG. 2, the bracket 11 is formed with a plurality of long holes 11a whose longitudinal direction is the vertical direction. A bracket 11 is attached to the front plate 1b with a bolt 12 communicating with the elongated hole 11a. For this reason, the fixed side restraint member 11 can adjust the position of an up-down direction.

  FIG. 6 shows three views ((A) to (C)) of the fixed-side restraining member 13, and the fixed-side restraining member 13 will be described below. The fixed-side restraining member 13 is configured by integrating a plate-like base portion 13a and a restraining portion 13b. As shown in FIG. 6A, a long hole 13c having a longitudinal direction in the front-rear direction is formed in the substrate 13a. As shown in FIG. 1, a bolt 14 that passes through the elongated hole 13 c is screwed into the upper end of the bracket 11, and the fixed-side restraining member 13 is attached to the bracket 11. As shown in FIG. 1, the fixed side restraint member 13 protrudes horizontally from the front plate 1b to the front. With such a structure, the fixed-side restraining member 13 can adjust the position in the front-rear direction.

  A restraining portion 13b that protrudes upward is formed at the front end of the restraining portion 13a. In the present embodiment, the restraining portion 13b has a mortar shape that is narrowed upward. At the bottom of the mortar, that is, at the upper end of the restraining portion 13b, a restraining hole 13d communicating in the vertical direction is formed. The inner diameter of the restraining hole 13d is slightly larger than the outer diameter of the electrode tip 105 to be cut, so that the electrode tip 105 can be inserted. In the embodiment shown in FIG. 6, the restraining hole 13 d is closed, but it may be open toward the front. As shown in FIGS. 1 and 2, the restraining portion 13b is located immediately below the holder 7, and the restraining hole 13d is coaxial with the electrode intrusion recess 7b. In other words, the restraining hole 13d is located on the entry side of the fixed shank 101 (shown in FIG. 7) with respect to the cutting blade edge 8.

  As shown in FIG. 6B, in the present embodiment, in the first half of the restraint portion 13b, the lower side of the portion where the restraint hole 13d is formed (the intrusion side of the fixed shank 101, that is, a one-dot chain line) The portion shown by (3) is cut out to form the visual recognition part 13e. In the embodiment shown in FIG. 4B, the visual recognition part 13e is formed by cutting out the front side of the center of the restraining hole 13d and below the part where the restraining hole 13d is formed. Alternatively, as shown in FIGS. 6D and 6E, the viewing windows 13h and 13i are formed in communication with the side surface or the front surface of the restraining portion 13b below the portion where the restraining hole 13d is formed. It doesn't matter. Thus, in this embodiment, since the visual recognition part 13e or 13h, 13i was formed, the lower side of the restraint hole 13d (that is, the entry side of the fixed shank 101) can be visually recognized. In addition, teaching of the robot arm is easy. As shown in FIG. 6B, in the first half of the restraining portion 13b, when the visual recognition portion 13e is formed by notching the lower side of the portion where the restraining hole 13d is formed, the fixed shank 101 is spread over a wide range. Therefore, the robot arm can be easily taught, which is preferable.

  As shown in FIGS. 6B and 6C, the inner side of the restraint portion 13b gradually decreases in width upward (from the fixed shank 101 entry side toward the restraint hole 13d). A guide surface 13f connected to the restraining hole 13d is formed. In the embodiment shown in the figure, the guide surface 13f has a conical surface shape whose inner diameter gradually decreases upward.

  As shown in FIGS. 4B and 4C, the outer surface of the restraining portion 13b is formed with a guide surface 13f that gradually decreases in width toward the upper side and connects to the outer edge of the restraining hole 13d. ing. In the embodiment shown in the figure, the guide surface 13f has a conical surface shape whose outer diameter gradually decreases upward.

  As shown in FIGS. 1 to 3, a movable side restraining member 17 is attached to the housing 1 via brackets 15 and 16. As shown in FIG. 1 and FIG. 2, the movable side restraint member 17 is located immediately above the holder 7. The bracket 15 is plate-shaped and has a plurality of long holes 15a whose longitudinal direction is the vertical direction. The bracket 15 is attached to both side plates 1a with bolts 18 communicating with the elongated holes 15a. For this reason, the movable side restraint member 17 can adjust the position of an up-down direction. The upper end of the bracket 15 is located above the gear box 2.

  The racket 16 is plate-shaped, and a plurality of long holes 16a whose longitudinal direction is the front and rear are formed. A bracket 15 is mounted on the pair of brackets 15 with bolts 19 communicating with the elongated holes 16a. For this reason, the movable side restraint member 17 can adjust the position of the front-back direction. The front part of the bracket 16 extends to the holder 17.

  A communication hole 16 b is formed in the front portion of the bracket 16. The communication hole 16 b is located immediately above the holder 7 and is coaxial with the holder 7. A movable side restraining member 17 that protrudes downward from the lower surface of the front portion of the bracket 16 is attached to the front portion of the bracket 16 coaxially with the communication hole 16b. In this embodiment, the movable side restraint member 17 has a mortar shape that is narrowed downward. At the bottom of the mortar, that is, at the lower end of the movable side restraining member 17, a restraining hole 17a communicating in the vertical direction is formed. The inner diameter of the restraining hole 17a is slightly larger than the outer diameter of the electrode tip 105 to be cut, so that the electrode tip 105 can be inserted. In the embodiment shown in FIGS. 1 to 3, the constraining hole 17a is closed, but it may have a shape that opens forward. As shown in FIG. 1 and FIG. 2, the restraining portion 17a is positioned immediately above the holder 7, and the restraining hole 17a is coaxial with the electrode intrusion recess 7a. In other words, the constraining hole 17a is located closer to the entry side of the movable shank 102 (shown in FIG. 7) than the cutting edge 8.

  As shown in FIGS. 1 and 2, the inner side of the movable electrode restraining member 17 gradually decreases in width toward the lower side, and a guide surface 17b connected to the restraining hole 17a is formed. In the embodiment shown in the figure, the guide surface 17b has a conical surface shape whose inner diameter gradually decreases downward.

  Since the movable electrode restraining member 17 is disposed immediately above the holder 7, the holder 7 does not fall off the holder gear 6.

  A cutting oil supply device 20 that supplies cutting oil to the rotary blade 8 is provided above the movable side restraining member 17. The cutting oil supply pipe 20 a of the cutting oil supply device 20 opens in the direction of the guide surface 17 b of the movable side restraining member 17. The cutting oil supplied from the cutting oil supply pipe 20a prevents seizure of the electrode tip 105 and the rotary blade 8 during cutting.

(Operation of the present invention)
FIG. 7 shows an explanatory diagram of the operating state of the chip dresser device 40, and the operation of the present invention will be described below. The electric resistance spot welder shown in FIG. 7 is a so-called C gun attached to the tip of a robot arm, and is movable so as to be detachable with a fixed shank 101 facing the fixed shank 101. It has a shank 102 and an electrode tip 105 is attached to the tips of the fixed shank 101 and the movable shank 102.

  As shown in (1) of FIG. 7, the robot arm is driven to move the fixed shank 101 and the movable shank 102 in a state where the electrode chip 105 attached to the distal ends of the fixed shank 101 and the movable shank 102 is separated. The holder 7 is moved to a position coaxial with the electrode intrusion recesses 7a and 7b.

  Next, the robot arm is driven to move the C gun vertically upward while maintaining the posture, and the electrode tip 105 attached to the tip of the fixed shank 101 is moved to the restriction hole 13d of the fixed side restriction member 13. And is pressed against the electrode intrusion recess 7b (rotary blade 8) of the holder 7, and the holder 7 is slid upward by a predetermined distance (state (2) in FIG. 7).

  Even when the fixed shank 101 is bent, the electrode tip 105 attached to the tip of the fixed shank 101 moves upward while being in contact with the guide surface 13f and is guided to the restraining hole 13d. The electrode tip 105 attached to the fixed shank 101 is surely inserted into the restraining hole 13d.

  Next, the driving device 3 is activated to rotate the holder 7. Then, the C gun is driven to move the movable shank 102 downward, the electrode tip 105 attached to the tip of the movable shank 102 is inserted into the restraining hole 17a of the movable restraining member 17, and the electrode of the holder 7 is inserted. The holder 7 is sandwiched between the electrode chips 105 attached to the tips of the fixed shank 101 and the movable shank 102 and pressed against the intrusion recess 7a (the rotary blade 8). At this time, the electrode tips 105 attached to the tips of the fixed shank 101 and the movable shank 102 come into contact with the cutting edge 8a of the rotary blade 8, and these electrode tips 105 are simultaneously cut and shaped. (State (3) in FIG. 7). In addition, from the beginning, the drive device 3 may be started and the holder 7 may be rotated.

  In the present invention, the peripheral surfaces of the electrode tips 105 attached to the tips of the fixed shank 101 and the movable shank 102 are restrained in the horizontal direction by the restraining holes 12d and 17a, respectively, and the entire welding gun is not shaken. Since the positional relationship with the electrode tip 105 is fixed, the electrode tip 105 attached to the distal ends of the fixed shank 101 and the movable shank 102 can be cut and shaped with high accuracy. In the present embodiment, the circumferential surface of the electrode tip 105, which is close to the rotary blade 8, is configured to be restrained in the horizontal direction by the restraining holes 12d and 17a, so that the electrode tip 105 generates chatter vibration during cutting. Therefore, it is possible to cut the electrode tip with very high accuracy.

  Even when the movable shank 102 is bent, the electrode tip 105 attached to the tip of the movable shank 102 moves downward while being in contact with the guide surface 17b and is guided to the restraining hole 17a. The electrode tip 105 attached to the movable shank 102 is surely inserted into the restraining hole 17a.

  In the embodiment shown in the figure, since the sliding surface 13g is formed on the stationary side restraining member 13, the cutting powder generated when the electrode tip 105 is cut slides down the sliding surface 13g and is discharged. The cutting powder is prevented from staying around the insertion hole 13d.

  When the cutting of the electrode tip 105 is completed, the C gun is driven to move the movable shank 102 upward so that the electrode tip 105 attached to the movable shank 102 escapes from the restraining hole 17a ((4 in FIG. 7). ) State).

  Next, when the robot arm is driven, the C gun is moved downward while maintaining the posture, and the electrode tip 105 attached to the tip of the fixed shank 101 is retracted from the restraining hole 13d, the electrode The shaping operation of the chip 105 is completed (state (5) in FIG. 7).

  In the embodiment described above, the electrode chip 105 attached to the fixed shank 101 and the movable shank 102 is inserted into the restraining holes 13d and 17a, respectively, and the horizontal direction is restrained by the restraining holes 13d and 17a. Although the present invention has been described, the fixed shank 101 and the movable shank 102 themselves may be inserted into the restraining holes 13d and 17a, respectively, and the horizontal direction may be restrained by the restraining holes 13d and 17a.

  In the embodiment described above, the present invention has been described with respect to cutting and shaping of the electrode tip 105 attached to the so-called C gun. However, the welding gun is not limited to the so-called C gun, and the tip dresser device 40 of the present invention is fixed. Needless to say, an electrode tip attached to a welding gun such as a so-called X gun having a shank and a movable shank can be cut and shaped.

  Moreover, if the tip dresser device 40 of the present invention is attached to a robot, it is possible to cut and shape the electrode tip attached to a fixed so-called stationary gun having a fixed shank and a movable shank.

  In the present invention, the fixed shank 101 or the electrode tip attached to the tip of the fixed shank 101 is inserted into the restraining holes 13d and 17a, respectively, and the horizontal direction is restrained by the restraining holes 13d and 17a. It is also possible to cut an eccentric electrode tip whose tip is eccentric.

  In the present embodiment, since the visual recognition part 13e (or visual recognition parts 13h, 13i) is formed in the restraining part 13b, when teaching the robot arm, the operator restrains the fixed side restraining member 13. It is easy to grasp the position of the hole 13d and the position of the electrode tip 105 attached to the tip of the fixed shank 101, and the robot arm performs an operation of inserting the electrode tip 105 attached to the tip of the fixed shank 101 into the restricting hole 13d. Teaching is easy.

  In addition, the electrode tip 105 attached to both ends of the fixed shank 101 and the movable shank 102 by the fixed side restraining member 13 and the movable side restraining member 17 is inserted into the restraining holes 13d and 17a, respectively, and the horizontal direction Although the present invention has been described with respect to the embodiment in which the movement is restricted, only the fixed-side restricting member 13 is provided in the tip dresser device 40, and only the electrode tip 105 attached to the tip of the fixed shank 101 is inserted into the restricting hole 13d. In this embodiment, the movement of the horizontal direction is restrained. Even in this embodiment, the entire welding gun is prevented from shaking, and the positional relationship between the rotary blade 8 and the electrode tip 105 is fixed. Therefore, not only the fixed shank 101 but also the electrode tip 105 attached to the tip of the movable shank 102 is precisely cut and shaped. Rukoto is possible. However, as described with reference to the drawings, in the embodiment in which the movable side restraining member 17 is further provided, the movable side restraining member 17 also restrains the horizontal movement of the electrode tip 105 attached to the tip of the movable shank 102. Therefore, the electrode tip 105 attached to the tip of the movable shank 102 can be cut and molded with higher accuracy, which is more preferable.

  In the embodiment described above, the holder 7 is configured to be slidable in the vertical direction with respect to the gear box 2. However, the holder 7 is fixed in the vertical direction with respect to the gear box 2, and the entire chip dresser device 40 is vertically moved. It may be configured to be slidable in the direction. However, if the holder 7 is configured to be slidable in the vertical direction with respect to the gear box 2, the mass of the sliding portion is smaller, so that the followability of the rotary blade 8 to the electrode tip 105 is improved, and the electrode is more highly accurate. The chip 105 can be cut and molded, which is more preferable.

  Although the present invention has been described above in connection with the most practical and preferred embodiments at the present time, the present invention is not limited to the embodiments disclosed herein. It should be understood that the present invention can be modified as appropriate without departing from the spirit or concept of the invention that can be read from the claims and the entire specification, and that a chip dresser device with such a change is also included in the technical scope. I must.

DESCRIPTION OF SYMBOLS 1 Housing | casing 1a Side plate 1b Front plate 2 Gear box 3 Drive apparatus 4 Primary gear 5 Secondary gear 5a Large diameter tooth 5b Small diameter tooth 6 Holder gear 6a Holder accommodating part 6b Key groove 7 Holder 7a Electrode penetration recess 7b Electrode penetration recess 7c Locking Part 7d Key groove 7e Rotary blade mounting part 8 Rotary blade 8a Cutting blade edge 8b Cutting blade edge 9 Key 11 Bracket 11a Long hole 12 Bolt 13 Fixed side restraint member 13a Base part 13b Restraint part 13c Long hole 13d Restraint hole 13e Viewing part 13f Guide Surface 13g Sliding surface 13h Viewing portion 13i Viewing portion 14 Bolt 15 Bracket 15a Elongate hole 16 Bracket 16a Elongated hole 16b Communication hole 17 Movable side restraint member 17a Restraint hole 17b Guide surface 18 Bolt 19 Bolt 20 Cutting oil supply device 40 Chip dresser device 50 Stand 01 sliding distance of the fixed shank 102 movable shank 105 electrode tip α holder

Claims (7)

Having a rotary blade formed with two cutting edges;
An electrode tip attached to the tip of the fixed shank, and an electrode tip attached to the tip of the movable shank that is detachable from and opposite to the fixed shank, sandwiching two cutting blade edges of the rotating blade, A chip dresser device for simultaneously shaping electrode tips,
A fixed-side restraining member in which a restraining hole into which a peripheral surface of a fixed shank or an electrode tip attached to the fixed shank is inserted is provided at a position closer to the fixed shank than the rotating blade, and is fixed to the rotary blade. A chip dresser device configured to cut an electrode tip in a state where a horizontal positional relationship with the shank or the electrode tip attached to the fixed shank is fixed.   The chip dresser device according to claim 1, wherein a visual recognition part is formed at a position closer to the entry side of the fixed shank than the restriction hole of the fixed side restriction member.   3. The guide surface connected to the restraint hole is formed in the restraint member on the fixed side, the width gradually decreasing from the entry side of the fixed shank toward the restraint hole. Chip dresser device.   The chip according to any one of claims 1 to 3, wherein a sliding surface is formed on the outer surface of the fixed-side restraining member so as to gradually decrease in width upward and connect to the outer edge of the restraining hole. Dresser device.   A movable-side restraining member in which a restraining hole into which a movable shank or a peripheral surface of an electrode tip attached to the movable shank is inserted is provided at a position on the movable shank entry side with respect to the rotating blade, and the rotating blade and the movable shank or The tip dresser according to any one of claims 1 to 4, wherein the electrode tip is cut in a state in which a horizontal positional relationship with the electrode tip attached to the movable shank is fixed. apparatus.   6. The chip dresser device according to claim 5, wherein a guide surface connected to the restraining hole is formed on the movable restraining member so that the width gradually decreases from the fixed shank entry side toward the restraining hole.   The tip dresser device according to any one of claims 1 to 6, wherein the rotary blade is configured to be slidable in a movable direction of the movable shank.

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