JP2011183426A - Grooving and supplying device for flux-cored wire solder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grooving and supplying device for a flux-cored wire solder capable of executing the grooving in a wire solder while preventing generation of chips, and reliably and consistently advancing and retracting the wire solder by the requested amount. <P>SOLUTION: A first roller 21 is arranged on one side of a transfer passage 16 for transferring a wire solder 5, and a second roller 22 is arranged on the other side. A guide groove 26 with the wire solder 5 being fitted thereto is formed on its outer circumference of the first roller 21, and a ring blade 33 with claw blades 34 for grooving and feeding being intermittently provided is provided on the second roller 22. A first corner part 34f forming the front side when at least a ring blade 33 is forwardly rotated out of the first corner part 34f and a second corner part 34g which are formed on a part where a blade tip 34e of the claw blade 34, a first side edge 34c and a second side edge 34d are connected to each other is formed in an arc shape. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a grooving supply device for flux-cored linear solder for performing grooving processing on linear solder containing flux and transferring the grooved linear solder toward an object to be soldered. is there.

  Inside the linear solder used for soldering electronic parts, etc., flux is used for the purpose of increasing the surface tension of the molten solder and preventing the formation of oxides to increase the wettability and diffusibility of the solder. Is built-in. Since the melting point of this flux is lower than the melting point of solder, when linear solder is heated with the heat of the tip during soldering, the flux vaporizes and causes a phenomenon such as an explosion, There has been a problem that the flux and the melted solder are scattered around and adhered to a printed circuit board, an electronic component, or the like, and a defective product is generated.

  In order to solve such a problem, Patent Document 1 and Patent Document 2 include a flux that is obtained by continuously cutting a groove having a depth reaching the flux with a rotating groove cutting blade on the side surface of the linear solder to be soldered. A technique for preventing the explosion phenomenon by letting the gas escape from the groove is disclosed. In these prior arts, linear solder that uses the groove cutting blade as a disk-shaped continuous blade and a guide roller having a V-shaped guide groove on the outer periphery thereof and fits into the V-shaped groove of the guide roller. A groove is cut into the side surface of the groove with the groove cutting blade. Further, the linear solder is fed by using a frictional force generated when the groove is cut by the groove cutting blade or by rotating the guide roller by a motor.

However, in the above conventional technique, slip is likely to occur between the groove cutting blade and the linear solder. Therefore, the linear solder is stably transferred by a necessary length while performing the grooving process. Is very difficult.
In particular, in an automatic soldering machine that automatically performs soldering, the soldering iron heats up after soldering one soldering point until the soldering point is moved to the next soldering point. It is indispensable that the linear solder is retracted by a certain distance (for example, 3 to 5 mm) so that the space for heat insulation is maintained between the linear solder and the tip so that the linear solder does not melt. However, in the above-described conventional technique, it is almost impossible to retract the linear solder once the groove is cut. For this reason, the above conventional technique cannot be applied to an automatic soldering machine as it is.

  Patent Document 1 also describes that the groove cutting blade is a gear-shaped intermittent blade. If such an intermittent blade is used, each blade bites into the side surface of the linear solder and discontinuous grooves are formed. At the same time as forming the wire solder, the wire solder is fed while being locked to the wire solder, so that the feeding problem is solved.

JP 2003-200290 A JP2007-290026A

  However, when the groove cutting blade is a gear-like intermittent blade, each blade moves around the side surface of the linear solder due to its rotation, so the edge of the linear solder Part is scraped off, and chips are easily generated. In particular, since the edge on the front side in the rotational direction of the blade is a portion that first bites into the linear solder and leads the grooving, the linear solder is scraped off to generate a lot of chips.

  Accordingly, an object of the present invention is to provide a grooving and feeding apparatus for flux-cored linear solder, while being able to perform grooving processing on the linear solder while preventing generation of chips, It is to be configured so that it can be moved forward and backward by a necessary amount reliably and stably.

In order to solve the above-mentioned problems, the grooving supply device of the present invention is disposed on one side of a transfer path for transferring flux-containing linear solder so as to be rotatable around a first axis perpendicular to the transfer path. A first roller; and a second roller disposed on the other side of the transfer path so as to be rotatable about a second axis parallel to the first axis. The second roller has a ring blade for grooving and feeding on the outer periphery.
The ring blade has a plurality of claw blades intermittently formed at a constant pitch on the outer periphery, and a groove having a depth that reaches the flux accommodating region by the claw blades biting into the linear solder by forward rotation. And the claw blade moves the linear solder backward by reverse rotation, and the claw blade has a first blade surface on one side in the second axial direction. And the second blade surface on the other side, the first side edge on the one side in the rotational direction, the second side edge on the other side, and the outer edge extending along the cutting edge circle connecting the tips of the nail blades. A front edge when at least the ring blade rotates forward among at least a first corner portion and a second corner portion formed in a portion where the blade edge and the first side edge and the second side edge are connected to each other. The first corner portion on the side is formed in an arc shape.

  Preferably, in the present invention, the first blade surface of the claw blade forms a plane perpendicular to the second axis, and the second blade surface is inclined in a direction gradually approaching the first blade surface toward the blade edge side. It has an inclined surface.

In the present invention, the second roller includes a main roller having a tip end and a base end, and the ring blade is at the tip of the main roller, and the first blade surface of the claw blade is on the tip side of the main roller. And the second blade surface may be formed in a posture toward the base end side of the main roller.
Further, the second roller includes an auxiliary roller having a distal end and a proximal end, and an annular roller having a smaller diameter than a blade bottom circle connecting the blade bottom of each claw blade in the ring blade to the distal end of the auxiliary roller. It is desirable that a flange portion is formed and that the flange portion is in contact with the first blade surface of the ring blade.

According to the present invention, by using a ring blade having a plurality of claw blades formed intermittently at a constant pitch on the outer periphery, grooving processing for linear solder, and forward and backward directions of the linear solder Can be reliably transferred without slipping.
Of the first corner and the second corner where the blade edge of the claw blade is connected to the first side edge and the second side edge, the first corner is the front side when the ring blade rotates forward. That is, the first corner portion, which is the portion that first bites into the linear solder and leads the grooving, is formed in an arc shape having no corners, so that the corner portion is locked to the linear solder and the This eliminates scraping off the linear solder and minimizes the generation of chips.

It is a side view which shows the whole structure of embodiment of the grooving supply apparatus which concerns on this invention. It is a top view of FIG. It is an enlarged view of the principal part of FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. It is a partial expanded sectional view which expands and shows the part which two rollers of FIG. 3 oppose. FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. 5. It is a side view of the main roller in which the ring blade was formed. FIG. 8 is a plan view of FIG. 7. It is a principal part enlarged view of FIG. FIG. 10 is an enlarged cross-sectional view taken along line XX in FIG. 9. It is a partial side view which shows the state by which the groove | channel was intermittently formed in the side surface of the linear solder | pewter by the grooving supply apparatus of this invention.

  1 and 2 show a flux-cored linear solder grooving supply device according to the present invention. This grooving and feeding apparatus has a case 1 having a square box shape, and a reel mounting shaft 3 is rotatably attached to the tip of an arm 2 extending from one end of the case 1. A solder reel 4 wound with linear solder 5 filled with flux 6 (see FIGS. 5 and 6) in the center is mounted.

  On one surface of the case 1 (upper surface in FIG. 1), a cover plate 10 and a base plate 11 are fixed in an overlapping manner, and two nozzle attachment members 12 attached on the base plate 11 with a gap therebetween, 13, the inlet nozzle 14 for introducing the linear solder 5 fed from the solder reel 4 from the solder inlet 14a, and the linear solder 5 fed from the inlet nozzle 14 into the solder outlet 15a. And an outlet nozzle 15 that is led out toward the soldering target.

  The inlet nozzle 14 and the outlet nozzle 15 are cylindrical members having linear solder insertion holes 14b and 15b, respectively, and are spaced from each other so that the solder insertion holes 14b and 15b are concentric with each other. Thus, a linear transfer path 16 through which the linear solder 5 is transferred is formed in a portion from the solder inlet 14a of the inlet nozzle 14 to the solder outlet 15a of the outlet nozzle 15. Has been.

A reference numeral 14 c in FIG. 1 is a delivery outlet attached to one of the nozzle attachment members 12, and is for sending out the linear solder 5 from the inlet nozzle 14 toward the outlet nozzle 15. Reference numeral 15 c is a receiving port attached to the other nozzle mounting member 13 for receiving the linear solder 5 in the outlet nozzle 15.
The delivery port 14c is tapered so as to gradually taper toward the exit nozzle 15 side, and the solder introduction port 14a of the entrance nozzle 14 is also tapered so that the entrance side becomes wider. Yes.

  In the space between the inlet nozzle 14 and the outlet nozzle 15, as can be seen from FIGS. 3 and 4, the first roller 21 is provided on the left or right side of the transfer path 16. The second roller 22 is disposed on the other side of the transfer path 16 around a second axis L2 parallel to the first axis L1. It arrange | positions so that it can rotate freely. In the case 1, an electric motor 25 that drives and rotates the second roller 22 in the forward and reverse directions is fixed and accommodated on the lid plate 10. The electric motor 25 is preferably a stepping motor.

The first roller 21 has a guide groove 26 in which the linear solder 5 is fitted on the outer periphery thereof. As shown in FIGS. 5 and 6, the guide groove 26 has a groove shape surrounded by three sides of a trapezoid, and a back wall 26a parallel to the first axis L1 and the first axis. It has the 1st side wall 26b which consists of a plane orthogonal to L1, and the 2nd side wall 26c which inclines in the direction where a groove width becomes narrow gradually toward the said back wall 26a side. The linear solder 5 having a circular cross section is fitted into the guide groove 26 so as not to protrude outside the groove, and is guided by the inclined second side wall 26c and always occupies a position near the back wall 26a. At this position, the rear wall 26a, the first side wall 26b, and the second side wall 26c are brought into contact with each other and positioned.
However, like the second side wall 26c, the first side wall 26b may be inclined in a direction in which the groove width gradually decreases toward the groove bottom side. Alternatively, the guide groove 26 can be formed in a V shape.

  A first roller shaft 28 is fixed to the center of the first roller 21, and a lower end of the first roller shaft 28 is attached to a roller support plate 29 detachably mounted on the base plate 11 via a bearing 30. Thus, the first roller 21 follows the linear solder 5 moving forward and backward, and is rotated in the forward and reverse directions.

On the other hand, the second roller 22 has a ring blade 33 for grooving and feeding the linear solder 5 on its outer periphery, and its specific configuration is as follows.
That is, the second roller 22 includes an upper main roller 22A having a front end and a base end and a lower auxiliary roller 22B. Flat front end surfaces 22a of the main roller 22A and the auxiliary roller 22B, The ring blades 33 are integrally formed at the tip of the main roller 22A.

As can be seen from FIGS. 7 to 9, the ring blade 33 has a plurality of claw blades 34 that are intermittently formed on the outer periphery at a constant pitch, and when the ring blade 33 rotates forward, the claw blade 34. Bites into the side surface of the linear solder 5, cuts intermittent grooves 36 (see FIG. 11), advances the linear solder 5, and the ring blade 33 rotates in the reverse direction, the claw blade 34 enters the groove 36. The linear solder 5 is retracted by locking.
Accordingly, it is desirable that the pitch of the claw blades 34 is such that at least one claw blade 34 bites into the side surface of the linear solder 5 regardless of the rotation position of the ring blade 33.

  As is apparent from FIGS. 9 and 10, the claw blade 34 has a first blade surface 34 a on one side in the second axis L <b> 2 direction and a second blade surface 34 b on the other side, and one side in the rotational direction of the ring blade 33. The first side edge 34c and the second side edge 34d on the other side, and the cutting edge extending along the circumference concentric with the second roller 22 (the cutting edge circle C1 (see FIG. 5) connecting the tips of the claw blades 34). 34e.

The first blade surface 34a is a surface facing the tip end surface 22a side of the main roller 22A, that is, the auxiliary roller 22B side, and is a plane perpendicular to the second axis L2. On the other hand, the second blade surface 34b is a surface facing the proximal end side of the main roller 22A, and is an inclined surface that is gradually inclined toward the blade edge 34e toward the first blade surface 34a. The second blade surfaces 34b of all the claw blades 34 are located in one common conical surface. And the said blade edge | tip 34e sharpened toward the outer side is formed in the front-end | tip part of the nail | claw blade 34 where the said both blade surfaces 34a and 34b cross.
The front end surface 22a of the main roller 22A is located in the same plane as the first blade surface 34a of the claw blade 34.
In the illustrated example, the angle α formed by the first blade surface 34a and the second blade surface 34b is 20 degrees, but other angles may be used, and the preferred range is approximately 15-25 degrees. .

  With this configuration, it is possible to reduce the thickness of the claw blade 34 as compared to the case where the first blade surface 34a and the second blade surface 34b are both inclined surfaces. As a result, when each claw blade 34 bites into the linear solder 5, the degree to which the linear solder 5 is pushed open to the left and right by the claw blade 34 to be deformed into a node shape can be suppressed, so that the deformation can be transmitted. It is possible to eliminate the influence on the. Further, generation of chips due to friction when the claw blade 34 pushes and opens the linear solder 5 can be suppressed. Moreover, the first blade surface 34a and the tip surface 22a of the main roller 22A are processed into one flat surface, and only the second blade surface 34b is processed into an inclined surface. The processing of the ring blade 33 is simpler than when processing 34b into an inclined surface having the same inclination angle.

  A first corner portion 34f formed at a portion where the blade edge 34e and the first side edge 34c are connected, and a second corner portion 34g formed at a portion where the blade edge 34e and the second side edge 34d are connected. Of these, the first corner portion 34f on the front side when the ring blade 33 rotates forward is formed in a circular arc shape without a corner, and the second corner portion 34g on the rear side remains angled. Has been. However, the second corner portion 34g can also be formed in the same arc shape.

  In this case, since the first corner portion 34f is a portion that first cuts into the linear solder 5 and leads the groove cutting, if the first corner portion 34f is square, its edge is a line. Since a large amount of chips are generated because the linear solder 5 is removed by biting into the side surface of the solder 5, the first corner portion 34 f is formed in an arc shape as described above. Since the first corner portion 34f smoothly bites into the linear solder 5 and separates smoothly, it is difficult for chips to be generated.

  On the other hand, the second corner portion 34g only traces after the first corner portion 34f and the cutting edge 34e bite into the linear solder 5 to form a groove. The amount of scraping the linear solder 5 is so small that it can be almost ignored. However, when the ring blade 33 rotates reversely to retract the linear solder 5, the second corner portion 34g may be locked to the linear solder 5, and therefore the first corner portion 34f. If it forms like a circular arc shape, generation | occurrence | production of a chip can be prevented more reliably.

  In addition, when the second corner portion 34g is formed in a square shape or in an arc shape, the sharply pointed above-mentioned point is provided between the second corner portion 34g and the first corner portion 34f. It is important that the cutting edge 34e is interposed in a state extending to some extent along the cutting edge circle C1. The reason for this is that if the entire tip of the claw blade 34 is formed into a complete arc or sine wave, the pointed edge 34e becomes substantially point-like, and the cutting resistance of the groove 36 increases, leading to the cutting. This is because not only smoothing is difficult to be performed, but also chips are easily generated.

The illustrated ring blade 33 is designed for grooving the linear solder 5 having a wire diameter of 0.6 mm, and a total of 36 claw blades 34 are formed at intervals of 10 degrees. However, a total of 18 nail blades 34 may be formed at intervals of 20 degrees, or any other number.
The diameter of the cutting edge circle C1 is 19.9 mm, the diameter of the cutting edge circle C2 connecting the cutting edges of the claw blades 34 is 17.8 mm, and the radius of curvature of the arc of the first corner portion 34f is 0.5 mm. However, it goes without saying that the diameters of the cutting edge circle C1 and the cutting edge circle C2, the radius of curvature of the arc, and the like are changed in accordance with the solder diameter of the linear solder 5 and the like.
The blade bottom is formed in an arc shape.

On the other hand, as shown in FIG. 6, the auxiliary roller 22B is integrally formed with an annular flange 35 protruding from the outer periphery of the auxiliary roller 22B to the front end thereof in contact with the main roller 22A. Yes. The flange 35 has a first flange surface 35a facing the tip side of the auxiliary roller 22B, that is, the ring blade 33 side, and a second flange surface 35b facing the opposite side, and the first flange surface 35a. Is a plane perpendicular to the second axis L2, and the second flange surface 35b is an inclined surface that is gradually inclined toward the outer periphery of the flange portion 35 toward the first flange surface 35a. It is conical. Further, the diameter of the flange 35 is smaller than the blade bottom circle C2 of each claw blade 34 in the ring blade 33. The first flange surface 35a of the flange portion 35 is in contact with the first blade surface 34a of the ring blade 33 in close contact with the first blade surface 35a.
The front end surface 22b of the auxiliary roller 22B is located in the same plane as the first flange surface 35a of the flange portion 35.

  The main roller 22A and the auxiliary roller 22B are fixed to a common second roller shaft 39 fitted in the central hole 38 of both the rollers with a set screw, whereby the second roller 22 is assembled. Yes.

  The main roller 22A and the auxiliary roller 22B can also be arranged with their positions and orientations upside down as described above. That is, in FIG. 4 and FIG. 6, the second roller 22 can be attached to the second roller shaft 39 in the upside down direction.

  As shown in FIG. 4, the lower end of the second roller shaft 39 is supported by the roller support plate 29 by a bearing 40 and extends into the case 1, and a driven gear 41 is attached to the lower end. As shown in FIG. 1, the driven gear 41 meshes with a driving gear 42 at the tip of the output shaft 25a of the electric motor 25, and the electric motor 25 causes the second roller 22 to move the both gears 41, 42. The motor is driven and rotated by a necessary rotation angle in the forward and reverse directions via the.

  Then, the first roller 21 and the second roller 22 are arranged in such a positional relationship that the cutting edge 34e of the claw blade 34 of the ring blade 33 reaches the flux containing area 6a of the linear solder 5, so that the claw A groove 36 having a depth reaching the flux accommodating region 6a is intermittently cut into the side surface of the linear solder 5 by the blade 34.

  The positional relationship between the first roller 21 and the second roller 22 is fixed while maintaining the positional relationship according to the wire diameter of the linear solder 5 to be used, and the positions cannot be adjusted. Therefore, when using the linear solder 5 having a different wire diameter, the roller support plate 29 is removed, and another roller support plate in which both rollers 21 and 22 are attached in accordance with the wire diameter of the linear solder 5 to be used. It is necessary to install. However, the position of at least one of the first roller 21 and the second roller 22 can be adjusted according to the wire diameter of the linear solder 5.

Reference numeral 44 in FIG. 2 denotes an operation switch 44 for turning on / off the electric motor 25. When the operation switch 44 is turned on, the electric motor 25 rotates in the forward direction so that the second roller 22 is shown in FIG. When the operation switch 44 is turned off, the electric motor 25 is stopped and the second roller 22 is stopped at the rotation position at that time.
However, when the operation switch 44 is tilted to one side, the electric motor 25 rotates forward, when the operation switch 44 is tilted to the other side, the electric motor 25 rotates reversely, and when the operation switch 44 is set to the neutral position, the electric motor 25 stops. It can also be configured.

  In the supply apparatus having the above-described configuration, when the use is started, the tip of the linear solder 5 drawn out from the solder reel 4 is connected to the solder insertion hole 14b of the inlet nozzle 14 with the operation switch 44 turned off. It is inserted into the guide groove 26 and fed between the first roller 21 and the second roller 22.

  Next, the operation switch 44 is turned on, and the second roller 22 is rotated by a required rotation angle in the arrow direction (positive direction) of FIGS. The linear solder 5 is advanced by being bitten into the side surface of the solder 5, the linear solder 5 is inserted into the solder insertion hole 15 b of the outlet nozzle 15, and then the operation switch 44 is turned off.

When the supply device is used for manual soldering, the required amount of linear solder 5 is sequentially sent out from the outlet nozzle 15 by turning on / off the operation switch 44 from the above state. Soldering is performed by melting the linear solder 5 with a solder iron tip.
At this time, as shown in FIGS. 5 and 11, a groove 36 having a depth reaching the flux accommodating region 6a by the biting of the claw blade 34 of the ring blade 33 is intermittently formed on the side surface of the linear solder 5. The formed linear solder 5 is fed by an amount corresponding to the rotation angle of the ring blade 33 due to the displacement of the claw blade 34 accompanying the rotation of the ring blade 33.
The first roller 21 is driven to rotate following the movement of the linear solder 5.

  Since the groove 36 is formed on the side surface of the linear solder 5 in this way, even if the flux 6 is heated at the tip and rapidly vaporized during soldering, the flux 6 evaporates from the groove. And there is no explosion phenomenon.

On the other hand, in the case where automatic soldering is performed by attaching the supply device to an automatic soldering machine such as a robot, the operation switch 44 is operated until the linear solder 5 is first led out from the tip of the outlet nozzle 15. After that, the soldering is performed automatically while the operation switch 44 is turned off and the control device of the automatic soldering machine automatically controls the supply device (electric motor 25).
Alternatively, the operation until the linear solder 5 is guided to the inlet nozzle 14 can be manually performed, and the subsequent operation can be automatically performed by the control device.

  When supplying the linear solder 5 toward the solder iron tip, the electric motor 25 rotates in the forward direction by a required rotation angle, so that the second roller 22 rotates in accordance with the rotation angle. Only the necessary amount of linear solder 5 is fed out accurately by the ring blade 33. The fed-out linear solder 5 is melted by the tip and soldered.

  Also, after soldering one soldering point, the linear solder 5 does not melt with the heat of the tip until the robot arm, that is, the solder iron, is moved and the next soldering point is soldered. When the linear solder 5 is moved backward by a predetermined distance (for example, 3-5 mm) and separated from the tip, the electric motor 25 rotates in a reverse direction by a required rotation angle, so that the second roller 22 also It rotates in the opposite direction by the corresponding rotation angle, and the linear solder 5 is retracted by a required distance by the ring blade 33.

  At this time, since some of the claw blades 34 in the ring blade 33 bite into the linear solder 5 and reversely rotate, there is no slip between the ring blade 33 and the linear solder 5. The linear solder 5 is accurately retracted by a necessary amount. Further, the claw blade 34 already separated from the linear solder 5 is again fitted and locked in the recess 36 to reliably retract the linear solder 5.

In the above embodiment, the second roller 22 is formed by coupling the main roller 22A having the ring blade 33 and the auxiliary roller 22B to each other. The ring blade 33 may be integrally provided on the outer periphery.
Alternatively, the second roller 22 can be formed by forming the ring blade 33 independently as a disk-shaped member and sandwiching the ring blade 33 between two fixing members such as rollers.

  The first roller 21 is driven to rotate in accordance with the movement of the linear solder 5, but may be driven to rotate in synchronization with the second roller 22 by the electric motor 25.

5 Linear solder 6 Flux 6a Flux containing area 16 Transfer path 21 First roller 22 Second roller 22A Main roller 22B Auxiliary roller 26 Guide groove 33 Ring blade 34 Claw blade 34a First blade surface 34b Second blade surface 34c First side Edge 34d Second side edge 34e Cutting edge 34f First corner 34g Second corner 35 Gutter 36 Groove L1 First axis L2 Second axis C1 Cutting edge circle C2 Cutting edge circle

Claims (4)

A first roller disposed on one side of a transfer path for transferring the flux-filled linear solder so as to be rotatable around a first axis orthogonal to the transfer path, and the first axis on the other side of the transfer path. A second roller rotatably disposed around a second axis parallel to the
The first roller has a guide groove on the outer periphery for fitting the linear solder,
The second roller has a ring blade for grooving and feeding on the outer periphery,
The ring blade has a plurality of claw blades intermittently formed at a constant pitch on the outer periphery, and intermittently cuts a groove having a depth reaching the flux containing area by the claw blades biting into linear solder by forward rotation. The linear solder is advanced and the linear solder is advanced, and the claw blade is configured to retract the linear solder by reverse rotation,
The claw blade includes a first blade surface on one side in the second axial direction and a second blade surface on the other side, a first side edge on the one side in the rotational direction, and a second side edge on the other side, and A first corner portion formed at a portion where the blade edge and the first side edge and the second side edge are connected to each other, and a blade edge sharpened toward the outside extending along the edge circle connecting the tips; Of the second corner portion, at least the first corner portion that becomes the front side when the ring blade rotates forward is formed in an arc shape,
A grooved feeder for flux soldered linear solder characterized by the above-mentioned.   The first blade surface of the claw blade forms a plane perpendicular to the second axis, and the second blade surface forms an inclined surface that is gradually inclined toward the blade edge toward the first blade surface. The grooving and feeding device according to claim 1.   The second roller includes a main roller having a distal end and a proximal end, and the ring blade at the distal end of the main roller directs the first blade surface of the claw blade toward the distal end side of the main roller and The grooving / feeding device according to claim 1, wherein the second blade surface is formed in a posture in which the second blade surface is directed toward the base end side of the main roller.   The second roller includes an auxiliary roller having a distal end and a proximal end, and an annular flange portion having a diameter smaller than a blade bottom circle connecting the blade bottom of each claw blade in the ring blade to the distal end of the auxiliary roller. The grooving / feeding device according to claim 3, wherein the flange portion is in contact with the first blade surface of the ring blade.

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